The point here is not about husband got emotionally trapped in giving away the money to his sister n nephew. The whole point is he breaching his wife's trust. After marriage, even if one wants to help his or her family members with their own hard earned money its totally fine. They can choose to inform or consult with their partners before giving the money or not as per the couple's understanding. But here, the problem is the husband chose to change the pin of the atm card belonging to "joint account" (not his own personal account) where "wife" deposited "her hard earned money" trusting her husband and it was meant for the use of their travel expenses. The bigger problem is he choosing not to even inform his wife about him changing the atm pin and handing over the card n pin to his sister and nephew when clearly it is a "joint" account and it was his wife's money not his own earned money in it!. Just my opinion. But this is total breach of wife's trust on her husband. He can do whatever he wants to with his money from his personal account but when it is a joint account with his wife's name in it, he has to consult his wife before doing the changes or giving access to his extended family members.