If a husband spends on his wife and one day he does not have money, can he take money from his wife without her permission considering it his own?
No, it is not permissible for the husband to take from his wife's money with out her permission. Wife's money is her money only and there is no right for her husband to think that it is his money.
All the livelihood expenses of the wife is on her husband even f she is a rich woman, and whatever he spends on her is her right on him and not loan on her.
Wassalam.