I wouldn't give her that much I'm sure she pockets it my sister used to do that say you'll buy the things they need she can tell u In advanced and then just drop it off and if she gets mad then u know she just wants your money for herself their should be no reason for her to get offended or mad I'm a mother myself and I would take that offer sounds very fair to me because you don't know what shes really wasting it on i have two kids and i do not waste that amount. Good luck