advice

So I went to my boyfriends house for Christmas yesterday and his grandma came. They did presents and everything then we went to his room where his brother was and watched tv. After a while I was getting tired so my head has on his chest and I was under the covers. I was half way asleep when his grandma came in (she is very religious) and she said where's Alicia and he said right here and then she said can she un attach herself and then I pulled my head from the covers and then she went to the other room and his dad came in screaming. After that I just decided to leave. Later that night his grandma told everyone that I was sucking his 🍆. Which my head wasn't even close to it. So long story short his grandma probably thinks I'm a whore now and his parents r probably mad at me for ruining their Christmas. What should I do.