OP, I have witnessed many family cases which involves gambling and divorce in my country. A man hid his gambling lifestyle from his wife for quite a long time and when she discovered it, she divorced him on grounds of gambling addiction and keeping it a secret from her which she termed "breach of trust" and she couldn't continue anymore because she feels he might be hiding more things from her which she can not be able to tolerate for keeping it a secret from her.

Situations as this is very sensitive that one would need to handle amicably. There is no crime in letting your spouse know about some things you do as she's part of you. This would also give her a sense of belonging in the home as she also takes part in decision making in the home.

Most times it's not about the gambling that makes wives divorce their husbands but rather keeping it a secret from them for such a long time running into years without their knowledge is what triggers the divorce because at that moment, they will not be able to trust you anymore for that act and they will push for divorce. Some women are like that, once they make their decision to divorce, it is final.