If a woman doesn't know that her husband is gambling, then it's already a marriage full of lies. It means she doesn't know her husband and doesn't know what he's doing.
A married friend of mine had to sell his luxury car because of gambling. When he sold the car, his wife found out he was gambling, and now they constantly fight.
Usually, many things are kept secret during a wedding, especially when a gambler marries, they keep the gambling secret and get married. When a wife finds out about her husband's secrets after marriage, there is nothing she can do, but there are some women who cannot accept the matter, which can lead to incidents like divorce. I had a friend who, after he got married, found out that his wife was drinking alcohol and after a while, she started living separately from him. At some point, when the friend stopped drinking alcohol, his wife started living with him again.
For some reason, that is a very bad way to start up a family, at least your spouse should be aware of all the weak points that you need to work on so that their can help you to work on them, Instead of acting as if you are ok whereas you have something to hide from your partner who surpose to be the closest person to you