I had a friend who had a swimming pool in his house. We used to swim some weekends. Once he went to buy beers. His wife asked me to push her up to leave though she could do it by herself. I took her waist and pushed her up but she became angry and told me to do it right while looking straight into my eyes. I could guess what she needed. So I put my hand just on her ass while my pointer finger could touch her asshole and pushed her up again. She fall back in the pool and asked me to do this again. I was almost hard. I told her you are tired so I give you a massage. She accepted and I did whatever I loved in her holes. It was stressful as every minute her husband (my friend) could be back. She was enjoying the pain (I was so nasty and putting it hard in her ass). When it ended she told me she had never had anal sex. And, this was the start of more than 4 years of sex partnership. We ended up as they moved to another city.