I fucked an older woman at the beach

I was at the beach with my friends and she was next to us with her two sons. I'm 21 and she is probably in her 40s and I didn't see a ring on her finger. Eventually my friends and her sons went swimming and two of us were alone. I was looking at her as she was adjusting her bikini and her boob slipped out. She saw me staring at her and them flashed me again. I was very excited and a little drunk so I decided to approach her. I said hi, your boobs look nice, wanna go to the changing room so I can get a better look? She smiled and just said sure. When we got to the changing room she took her bikini off. I started kissing and touching her and we had a quick fuck. It was so good and after we went our separate ways.