Reading stories about friends mothers

Back when I lived in Texas I once fucked a friends mother, I gave her a ride to the store and one thing led to another with us, we ended up going to a park after she was done at the store. We went into the woods near by and she gave me head then I fucked her doggy style, it didn't last long maybe a half hour at best. Her husband was at work as so was my friend and she didn't drive so she called me to take her to the store if I could, at the time I was off work so it wasn't a problem. I was 19 at the time and she was 53. Nothing ever happen between us again afterward nor did anyone we knew ever find out about it, this all occured in Sept of 1986. I live in Missouri now and have for some years, but me and him still keep in contact and are still friends, he just don't know me and his mother had fucked once in the past.