In their last sighting before announcing their divorce , Halle Berry and Olivier Martinez showed no signs of the impending split. 
 
 The 49-year-old actors were at a Los Angeles Halloween fair on Oct. 17 with their two-year-old son, Maceo, looking happy and affectionate. 
 
 An eyewitness tells ET the two actively helped Maceo decorate a pumpkin. At one point, Martinez put his hand on Berry's shoulder, and they both seemed very comfortable. 
 
 Another eyewitness says that the two were "close with one another" at the event, and smiled a lot while they "doted over Maceo, looking like happy parents." 
 
 "He was carrying her bag and was gentle and loving," the source continues. "At one point he put his hand on her shoulder, never would have thought there was trouble. They stayed at the party for about two hours." 
 
 There were a few other celebrity sightings at the fair, including Modern Family's Ariel Winter and Julie Bowen, as well as Channing and Jenna Dewan Tatum. Channing even posted a picture from the event, writing, "Pretty sure I terrified all the children at our daughter's Halloween carnival today. Btw- I'm pooh bear in case anyone can't tell." 
 
 This is Berry's third divorce. The actress was married to baseball player David Justice and singer Eric Benet, and dated model Gabriel Aubry, with whom she has one daughter, 7-year-old Nahla. Split rumors began to spread for the former couple when Berry was s potted without her wedding ring in August. The two have been married since July 13, 2013 , and have one child together. 
 
 The last red carpet appearance the exes made together was in February at the Treats! Magazine Oscars party. 
 
 A joint statement sent to ET on Tuesday by reps for both Berry and Martinez reads, "It is with a heavy heart that we have come to the decision to divorce. ‎We move forward with love and respect for one another and the shared focus of what is best for our son. We wish each other nothing but happiness in life and we hope that you respect our and, most importantly, our children's privacy as we go through this difficult period." 
 
 Meanwhile, last week, Berry and Martinez were hit with a $5 million lawsuit over an alleged incident with an LAX employee that happened on Jan. 4. Ronaldo Owens claims that Martinez "brutally and intentionally charged at him using an empty child's car sear he held in his hands as a weapon, striking [him] to the ground with the seat, and causing [him] humiliation and injury." At the time, Owens says he was in a designated area in the corridor that Martinez and Berry were being escorted down that is used for high profile passengers, and was trying to take video and photos of them along with other employees. 
 
 When ET last caught up with Berry at Comic-Con in July, all her focus was on her show, Extant. 
 
 "There's a lot of sexual energy," Berry teased about the latest season of the CBS sci-fi series. "We didn't have that last year." ||||| Olivier Martinez Files for Divorce Against Halle ... The Plot Thickens 
 
 Olivier Martinez Files for Divorce Against Halle ... The Plot Thickens 
 
 EXCLUSIVE 
 
 Olivier Martinez has just filed for divorce against Halle Berry, TMZ has learned ... and the plot is thickening. 
 
 TMZ broke the story Halle filed for divorce Tuesday morning, but the divorce petition is nowhere to be found in the system. A source connected to Halle tells us it was filed under pseudonyms. 
 
 Apparently Olivier doesn't think fake names are kosher, so his lawyer, disso queen Laura Wasser, has just filed for divorce listing Olivier as the petitioner. 
 
 As for why being the petitioner is important, in Hollywood it matters who left who. 
 
 Olivier's asking for joint custody of the couple's 2-year-old son, Maceo. As we reported, they have a prenup so money will not be an issue. 
 
 We're told Olivier and Halle have not been getting along and last week was a breaking point, after an LAX employee sued Olivier for pushing a car seat into his chest. He also named Halle and we're told she went nuclear on Olivier saying he's responsible for her bad publicity. 
 
 We're told Halle and Olivier had a fundamental personality clash. She is "very difficult" and "goes nuts when she doesn't get her way," and Olivier has a temper, though not violent toward her. It was a bad combo. ||||| Fighting fire with fire! Halle Berry and Olivier Martinez announced their decision to divorce after two years of marriage on Tuesday, Oct. 27, and a source tells Us Weekly that the time leading up to their split was “very heated.” 
 
 “It was nonstop fighting towards the end,” the source tells Us. “Two very hot-headed people. Lots of screaming and fighting. It was really bad. They both have major tempers and were locking heads constantly. It’s going to be a very bitter divorce.”' 
 
 PHOTOS: Celebrity splits of 2015 
 
 On Tuesday, Berry and Martinez, both 49, told Us in a joint statement that it was “with a heavy heart” that they had decided to pull the plug on their relationship. “We move forward with love and respect for one another and the shared focus for what is best for our son,” they said. “We wish each other nothing but happiness in life, and we hope that you respect our, and most importantly, our children’s privacy, as we go through this difficult period.” 
 
 Amanda Edwards/WireImage 
 
 Berry filed legal documents again on Wednesday, Oct. 28 — this time using her real name instead of a pseudonym. 
 
 Just one week ago, the pair were all smiles during a family outing with their 2-year-old son, Maceo, at a Halloween party in L.A.'s Sherman Oaks neighborhood on Saturday, Oct. 17. 
 
 But, the source tells Us, things with the pair aren’t always as they appear to be. 
 
 PHOTOS: Hollywood's ugliest divorces 
 
 “Things were extremely bitter with them as the marriage went on and in the end,” the source adds. “Finally they both tried to file against each other. It was always like that, very heated and a lot of competition and battling between them. Two extreme tempers and people that love to fight.” 
 
 The Extant actress and Martinez tied the knot in 2013 after meeting on the set of Dark Tide in 2010 and secretly getting engaged one year later. 
 
 PHOTOS: Hollywood's most expensive divorces 
 
 Berry was previously married to baseball player David Justice from 1993 to 1997, and to R&B singer Eric Benet from 2001 to 2005. She and ex-boyfriend Gabriel Aubry share one daughter, 6-year-old Nahla. 
 
 Can't get enough of Us? Sign up now for the Us Weekly newsletter packed with the latest celeb news, hot pics, and more! ||||| 'Fiery Personalities' and Living Apart: Inside Halle Berry and Olivier Martinez's Split 
 
 VIDEO: Halle's Changing Looks! 
 
 From almost the start, it had been a rocky romantic road for Halle Berry and Olivier Martinez . Now, as the couple confirm they are splitting after two years of marriage , sources tell PEOPLE clashing priorities and headstrong temperaments ultimately doomed the pair."They have had many issues," a source close to the couple tells PEOPLE. "They both have fiery personalities and don't like to compromise. Halle has threatened to file for divorce several times after arguments."So what was the breaking point? According to the source, one major issue between the couple was their living situation.When Martinez and a pregnant Berry tied the knot in 2013, their plan was to raise their family – including Berry's daughter from a previous relationship, Nahla Ariela – in Europe. But when Berry got locked in a custody battle with Berry's ex-boyfriend, model Gabriel Aubry , the plan changed.Due to the custody agreement, Berry, 49, had to stay in Los Angeles in order to raise her daughter, forcing Martinez, 49, and their newborn son, Maceo-Robert , to relocate to L.A.According to the source, Martinez had a hard time adjusting: "Olivier never loved living in L.A. full time. [He] just isn't happy in L.A."Another issue, says another source who knows the couple, was Martinez's temper."He has a violent temper," the source told PEOPLE this summer. "[Friends say] he has an out of control hair-trigger temper."In 2012, Martinez got into a brawl with Aubrey at Berry's house on Thanksgiving. This year, cameras caught Martinez shoving an empty car seat toward an LAX employee as he, Berry and the kids exited the airport. The employee is now suing the couple for $5 million.The couple were also apparently at odds over how to balance family life with work, the source told PEOPLE just months before the split."Olivier is complaining that he and Halle are not spending much time together and that she is working too much," said the initial source. "He never wanted her to sign on for [CBS's Extant] and Olivier was hoping they would focus on family time together after Maceo was born."With Berry on the road to promote her acting career, Martinez found himself growing lonely."He complains he spends his days alone, or with friends," said the first source. "He doesn't understand why Halle wants to work so much and is still so focused on her career. Halle has instead been extremely busy and Olivier, who has not been working, is very bored in L.A."The second source confirmed to PEOPLE this summer that Martinez "goes to France a lot. He hasn't worked in a long time."After it became clear that they were both unhappy in their marriage, they tried to make their relationship work for the sake of their children. Their solution? Spend time away from one another, even living apart for extended periods of time."They are both aware that they have difficult personalities and have tried to stay in the marriage by not living together. Many times, Halle [had] been staying at the Malibu house and Olivier at the Chateau Marmont. They are much better when they don't spent too much time together," said the first source close to the couple, adding "They have gone weeks without seeing each other, but then has managed to patch things up again.But with separate living arrangements and Berry's hectic work schedule, the distance eventually drove them apart."Even though they are married, they always had very separate lives," said the initial source. "Their marriage has never been what Olivier imagined it to be. It's been a disappointment to him." ||||| Starting in 1996, Alexa Internet has been donating their crawl data to the Internet Archive. Flowing in every day, these data are added to the Wayback Machine after an embargo period. ||||| Inside Halle Berry and Olivier Martinez's Divorce: Her Alias, His Temper, and Their Race to Court 
 
 As Halle Berry and Olivier Martinez gear up for a potential divorce fight, everything from who filed for divorce first to allegations about Martinez's temper could become factors in court.The couple filed dueling petitions for divorce this week: Berry submitted hers under the alias "Hal Maria" on Monday and Martinez filed his own on Tuesday. On Wednesday, PEOPLE confirms, Berry submitted a second petition – identical to the first but without the use of pseudonyms. Filing separate petitions could be a play to gain an upper hand if the case moves to court, a legal expert says."For tactical reasons, some attorneys want to file first because if you’re the petitioner and the case proceeds to trial, you get to put on the case first," Robert Brandt, a family law specialist in California, tells PEOPLE. "It gives you that advantage."A source close to Berry says she had other motivations. "She filed first, but she didn't draw attention to it," the source says. "Halle filed under fake names to protect both them and their kids."Filing under an alias "is kind of a grey area because you're supposed to use your real name," adds Brandt, who is not representing either party. "But as long as she's not using the fake name to commit fraud, she can probably get away with it." And with Berry's new petition, the case is back under both Berry and Martinez's real names, though it's unclear yet which of them will be ruled to be the petitioner.Both parties filed for joint custody in their petitions. "She wants to share custody and she is being so amicable," the source close to Berry says. But there are already signs that drama could flare up in the divorce: A source close to the couple told PEOPLE that Martinez had an explosive temper that frightened Berry, though the source says he was never physically abusive to her or their 2-year-old son Maceo. If Berry and Martinez can't agree on custody, Martinez's violent episodes – including a 2012 brawl with Gabriel Aubrey, the father of Berry's daughter Nahla – could be used against him, Brandt says: "In terms of child custody, absolutely."He continues, "She can use that as grounds to claim he has a propensity for violence, but she really has to prove the violence directly affects the child." However, if Martinez can prove that "he’s been a good dad and he’s been involved," Brandt says his alleged temper "ultimately might not be that relevant."Martinez's ties to his native France could also become a point of contention in the divorce. As previously reported, one of couple's marital difficulties was his preference to live in Europe. In Berry's petition, she even specifically asks that Martinez get permission before taking their son out of California.But according to Brandt, neither parent can take Maceo out of the state without special permission during the divorce proceedings. "There are certain automatic restraining orders that occur the minute you file," he explains. "If the child is in California with one of the parents, there is a specific restraint that the child cannot be removed from California without the written consent of the other party or a ruling by the court."Moving forward, Berry and Martinez will have to determine who will have temporary custody of Maceo during the divorce. Lawyers for both parties will then spend time sorting out their individual estates with regards to their prenuptial agreement, which Berry states in her divorce petition allows her to keep all of her earnings and assets. "The prenup might have stipulations regarding spousal support, but I don’t think either one of them are financially desperate," Brandt says, adding that spousal support could be waived altogether.Child support, on the other hand, cannot be waived, according to the lawyer, who says payments will be determined based on who makes more money. "If one party is earning significantly more income, they still might have to pay child support, even if that party has the child over half of the time."Regardless of either party's amicable intentions, "there’s a lot to sort out," Brandt says.
– What led Halle Berry and Olivier Martinez to file for divorce? According to People's sources, Martinez's temper is largely to blame. "He had an explosive temper in a way that was profoundly frightening," one source says. "You never knew when he would explode." But, though "he was very possessive in a very kind of caveman way, he was never physically abusive." Still, the source says, Martinez's "anger management issues" and the "unnerving" nature of his "unpredictable temper" were the last straw for Berry. (Though her temper doesn't sound much better—another source previously told People, "They both have fiery personalities and don't like to compromise. Halle has threatened to file for divorce several times after arguments." And a TMZ source says she's "very difficult" and "goes nuts when she doesn't get her way.") "It was non-stop fighting towards the end. Two very hot-headed people. It’s going to be a very bitter divorce," another source tells Us. Sources also say Martinez wasn't happy living in LA and didn't feel he and Halle got to spend enough time together due to her work schedule. As for the aforementioned "bitter divorce," that's already looking to be true: Berry first filed for divorce under an alias to avoid publicity, then Martinez filed his own paperwork, then Berry filed again using her real name, People reports. A legal expert says she probably wanted to be the first to file in order to be considered the petitioner and thus gain a "tactical ... advantage" in court. TMZ says it's clear she wants to be the petitioner and that a "fight" seems to be inevitable. People also notes that the two seem to disagree on the issue of spousal support, though they do have a prenup. Both are seeking joint custody of their son. (Berry and Martinez looked happy together less than two weeks ago.)