In a situation where the both spouse are gamblers. Husband gambles, wife gambles, how can both of them manage the situation in terms of finance and the family affairs especially when children are now involve so that the time both spends on gambling doesn't affect family moments and affairs in general.
Would it help if one of the couple quit for the other and if that's the case who should quit for who.
Well, it’s awkward but in a way, it seems that’s how the both of them do connect, through gambling. At least, they’ve got something in common, something to talk about, something that bonds them together so, why would you want to take that away from them. You might end up breaking their relationship.
Instead of either of them having to stop, I think they are better off, discussing there gambling options, what bets to take and not take, what stakes to make, what limits to set on there gambling habits and they might just find some means to manage their homes even with the gambling. There might not really be a need to quit the way, just some effective management of the situation.
Well, I disagree with you, is either you are not married yet, but if you are, and you think it's OK for married couples to both be gambling, then you are not completely married yet

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There are so many other things through which a husband and his wife can bond together, things are more normal and less awkward, things that are more likely to bring long term fun and not cause financial sorrow of any kind.
A husband and wife can bond together by constantly cooking together, washing together, going out on a date, watching movies together, and so many other things that won't give them the chances of winning money, which also means they could lose money as well, which when a lose happens, it could affect them both.
Family live is full of expenses, most especially when children are already involved, the dumbest thing a husband and a wife would do is to spend money that should have been used for their children school fees, or other important things in the house, on gambling.