Surely as she opened the account, she has eveything she needs to be able to get the money out, for example by transferring it to another account. If she forged your signature once she can easily do it again. In fact the signature would be "genuine" because that is the signature associated with the account. The name she writes is irrelevant. Your signature was not on the original paperwork, so you should not be able to sign a withdrawal. I know it is a bit of a technicality, but it could be important. She does not need you to withdraw the money.