At what point can you ask for money in a relationship?

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My girlfriend of 6 months has been out of work for the past two weeks and she just got word that she will be laid off permanently. She asked me could she move in with me. I told her that I'm not ready to share my home with anyone. She offered to pay half the bills; I declined. She then proceeded to ask me could I pay her rent for next month. I told her that I'm uncomfortable doing things that a husband should do, for my girlfriend but I told her that she could borrow $300. She says that I'm wrong for not helping her out during her time of need but that isn't the case from my perspective. She says that she isn't sure that she will continue dating me. Am I in the wrong here or is this just another case of woman feeling entitled?