I allways had a fantasy about sex with my mother in law.

She was a complete dissapointment, she is a typical granny, big tummy, ass and big hanging boobs, she was 68 then (I was 38).
It took me a lot of effort and finaly, when I was visiting her one afternoon to help her out with something, she gave in.

I found out she is from a total different generation, talking of sex. She did not want it to do it in the kitchen where we were, it had to bed in her bedroom, the only place to have sex. She let me undress her, I had to do it myself, and layed down on the bed. She spread her big legs, she hardly touched me or let me touch her. She did not spoke besides to hurry because she was expecting a phone call. I did because I wanted to feel how it is like to fuck my fat mother in law.
It felt good and after a while she began to move along and moaned. I shot my load after a few minutes and that was it.

We cleaned ourselves and my mother in law asked me if I was satified.

I am not quite sure if she meaned I am satisfied by the sex with her or being satified by having her after all the time I am after her.

Never had sex with my mother in law since.