I did it with my cousins girlfriend[MF]

I had sex with my cousins girlfriend last night.

Both my cousin and his girlfriend are 22, I am 20. They just came to the states from Peru about three months ago. They have a three year old together. Anyways there was a family get together yesterday held at my uncles house. The get together turned into a party and everyone having fun. Once I got to the party I greeted everyone, I then went to my cousin and his girlfriend(Andrea) to greet them and we talked for a bit and cousin went to somewhere so I stayed with Andrea.

We talked and she asked me for advice on adjusting to a new country, she asked about citizenship, how to get a better job, how to send money to her family in Peru, etc. Eventually she asked me to dance and we did and it was fun. Fast forward to 3am and mostly all of our family members have left, my cousin was so drunk he stayed on the couch, Andrea and I didn’t really drink at all, maybe a cup or two. My uncle told me to stay the night since I will an hour away.