Is it normal that when i was drunk, i had sex with my cousin?

So i went to visit my family over the weekend and my mom as well as my aunt and uncle had all left to go to the casino. My cousin and i were home alone, with nothing to do. We decided we would start drinking.
*side note- i'm 19, he's 24, and we've never been sexually attracted to one another before*
After we had finished the bottle of Crown Royal we were working on, we were both unbelievably drunk. We put some music on and he asked me if i wanted to dance. As we were dancing, i could feel him pulling me closer and closer to his body, he was grinding up against me and i could feel his pulsating erect penis against my body. this turned me on. I have never been that drunk in my life, and alcohol does tend to make me very horny. The next thing i knew, he was kissing me and groping my breasts, it felt so good, i didn't even care that he was my cousin. As things escalated, we headed upstairs into his bedroom, where i was sleeping for the night. we ended up having passionate, consensual sex for the next 3 hours, i orgasmed and climaxed multiple times. We past out in each others arms. When i woke up the next day, with a major hand over, hallf naked laying in his arms, i realized how horrible of a thing i had done, and i felt so ashamed, but at the same time, i don't regret it.

I don't plan on ever doing this again, or ever drinking around him again to that extent.

I just wanted to know if you guys think this is normal?