"apologized either way."

You have( maybe or maybe not purposefully) left out "either way" which means it need not be inappropriate by intention. Even then sadly, an apology is not enough for some weird concocted subjective self victimization and the eyes of OP's woman start putting off fire until the life of the OP gets totally ruined.

"brought up her ass to me", "She shook her ass at me despite us having no real relationship","but they are all adults who don't behave like this to me." are as clear as sunny day.

Sounds like that stupid woman came up to him and tried to seduce, sexually harass, or pull a cheap attention mongering stunt in the name of "part of fun time at office". You may find this ridiculous but there are women who do this. I have had to push a woman off of me in not so tightly packed elevator while she was "having fun" with her butt rubbing my genitals. She in fact, laugh out loud explaining this experience with colleagues in the office as 'first time an anal' and her boyfriend later.

I was mortified and violated, fresh in the memory till date, but hey! since I am a guy, I am some closet monster prowling on women with a magical magnetic genital, who has total disregard to my sweat and blood to barely hope to lead a dignified life, have intact family and be a dedicated earner of higher promotions. Nobody should care if all of these require just one domino to start falling with, eh? Everybody can just paint me defensive and accept whatever non-sense as consequences of "my" acts.

We must just believe and be at mercy of these women or risk all that we earned if we speak up against in these situations. In the mean time, those who did, just deny deny deny and gas-light them and brush them of as liar who genetically are incapable to treat women as fellow humans.

The problem with us human beings is we have ingrained the gynocentric justice system in our minds where perhaps the women can never be wrong at all. Its always the guy's fault. Firstly we start by dismissing their experiences In the mean time, we start assigning them some "responsibility" they didn't need to burden themselves with in this misandrist new world. This is insulting to men and greatest injustice to other women as well.

The OP's situation is also the time where people in same page say acceptable light-hearted comments which otherwise would be inappropriate or lewd. These comments are passed by women themselves routinely and accepted very well by bosses. For I have seen women spank a guy's arse and praise "sexy!" in stationary rooms or pull tie and ask something work related with innuendos, etc. I mean obviously an action gets a reaction, however confused or exhausted it may be. In fact, many do have a slip of tongue in exhaustion, how so ever we press hard to deny them of their own life experiences. We should not treat men like they don't matter, they are constantly doubted, they are not valued and be dismissed just because the opposite party in the situation happens to be a woman.

There should be laws that outright fire these women with a code of conduct stamp as sexual harasser. That is the supposed real world we should give women to train them to treat men with respect and stop gas-lighting them.