Aug, this kind of financial arrangement is going to cause a lot of anger and resentment on her side and frustration on yours. Instead of meting money out to her on an as-needed basis you should really agree on a set amount that you pay into her account weekly or bi-weekly or monthly. If she runs out before the next transfer then that's her problem. She wants to be single, she's got to learn to manage money as a part of that. And you need a set amount that you can budget around.