Can I be sued for putting money on someone's account, them spending it, then it getting charged back.

2 years ago this May I came to visit my friend in another state. I had no money but said it was ok, she'd take care of me while I was there. My father while I was there offered me $700. I didn't have a bank account and so I gave it to her through paypal from his credit card. I never saw the money and do not know what it was spent on but I didn't care because she was housing me. My dad later filed a claim on his credit card and got the money taken back. By this time I had moved to Florida, had a job and was living with her. She did not care about the money then. Now we've had a falling out in our friendship and she is taking me to small claims court to get the money that was my fathers back from me. There was no contract involved in me giving her the money, it wasn't really even given to her in exchange for anything and I don't know where it was spent I barely ate while I was there and wasn't on any lease. Am I legally bound to give her anything?