Is it normal that she is accusing me of rape?

When I was eighteen, my parents went on vacation and asked me to house-sit. I had a small group of my friends over so that we could "party" together. Half of us got pretty drunk, but one drank so much that he was barfing all night. I was worried about him (alcohol poisoning) and I was worried that I'd have to take him to the hospital. Everyone else crashed on the chesterfields, but I hauled my friend's drunk ass up to my room and made him sleep on the floor with a bucket and a towel for a blanket. I slept in my bed, but would wake up and check on him every hour to make sure he wasn't dead or in a position where he'd aspirate his puke.

He ended up being fine, but a few days later, I heard from some of our friends that he'd been telling people that I tried to rape him. I was furious that he was spreading that rumor so I confronted him. He said that he was just joking around and that he didn't think people would take it seriously. What a dickhead!