I had a similar experience. I gave a model a fairly large sum of money. She did not ask, but because I was her friend I knew that she needed it. I was at the right place and time to help - so I did. It lightened her burden and gave some confidence to me and her.
Fortunately, by some instinct, I did the right thing. I never asked her what she did with the money and I did not ask for anything in return. 3 years later and after she quit webcam, we still talk regularly.
In general – the virtue of giving and being generous to someone is in the intention and the act of giving itself. It is not in the expectations of the results. Usually there is some level of trust before giving something to someone. A trust that the gift will be used wisely. But at the same time there should be a respect for her freedom to choose how she uses the money – after it is given. She has the right to make her own decisions and use the money as she sees fit. It can also be said that from her standpoint she should be responsible and use her opportunities wisely.