My girlfriend and i slept together and her dad found out?

I was over at my girlfriends house and i am 13 she is 12 and we we both siting against the wall on her futon watching a movie and she fell asleep on my chest, and i eventually did too. I just loved it so much and that she would sleep on my chest and i could feel her nice vibranty soft hair in my face and anyway we both fell asleep. The Other thing of clothing i had off was my socks and sneakers, but she had taken her pants off so it was just her underwear. Anyway about an hour later her dad got home from work and saw me and her on HIS futon in the living room sleeping on eachother. He punched me in the face so i started to fight back and i hit him in his nuts, then he hit his daughter for doing this? I kicked him again and now my GF is living with me, its been like 4 hours since this all happened, what will happen and what should i do?