Gambling will be the most important thing in his life. Like an alcoholic who will do anything for a drink, he will do anything to shoot dice, play cards, or bet on horses. My experience with addictions has taught me that if there is one addiction, there are at least three others. My ex's other habits were porn, drinking, and other women. He hid them well.
Gamblers are usually very secretive.
And they can be mean when they are losing. Remember, there is a nasty characteristic called greed behind gambling. It will end in heartache. I beg her to dump that creep and look for a kind, decent man who deserves her love. For more than 30 years, I've been telling my readers who suffer with this affliction to join Gamblers Anonymous.