Is it a nude and can I get in trouble for it?

So this girl i met off of a dating site for adults have been messaging each other for a few days. She sent me a few nudes out of the blue and asked for some in return. Hesitant to send anything because im just not into that sort of thing i sent her a pick of me in my underwear (there was a bulge if you know what I mean). She then replied with "im going to record a sexy video for you". A few days passed and I just got a phone call and a text from a man claiming to be her father saying that she is only 15 and he is trying to make me pay for the laptop she broke while recording the video and says he is going to be taking me to court.
Is it a nude and can I get in trouble for it?
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