I don't know the husband that will be happy with the wife to disclose that she is gambling without profit. Gambling is about profiting and many gamblers have been criticized for gambling without profit and encouraging them to stop. So if the wife is gambling and she is not making profit, what is she going to be telling the husband? Just to disclose to him she has been using family to gamble without profit?
Except she is coming to make a confessional statement to the husband that she has been gambling without profit and she wants to stop.
If she disclose to her husband that she is gambling and the husband see she is not making profit and if she is asking to continue then he will demand to know how long she has been gambling and that will determine if he will support her or not. What about if the husband does not gamble, then this will become another kettle of fish because she has to show she has been profiting for she to continue.
I think everyone knows that gambling is not always profitable as long as he can stick to his responsibilities and not overdo it then his gambling will be fine and a husband should be able to understand that his wife needs entertainment, not just taking care of the household because with this entertainment a wife cannot will feel inner pressure due to fatigue and most importantly there are no secrets between husband and wife if they want to do something they want.