Guilty I suppose
When my wife's mother showed up one day to visit with her, my wife at the time was supposed to be out of town to visit HER Mother. Her Mom lived about 2 hours away at the time and had the bad habit of just dropping in unannounced about twice a year or so when she came to our town to shop at the huge shopping mall we had. She and her husband lived way out in the country, and had a huge ranch with cattle, Sheep, timber and hay crops.
I was a bit surprised and told her mom that her daughter had left the day before for a visit. She got a strange look on her face and blushed, I knew right then.
She apologized for my wife, and told me she had a serious crush on some boy she dated in high school, for some reason she apparently was still having a fling with him, but she had assumed it was over.
I invited her in, her mom is barely 16 years older than my wife, and the spitting image, looking more like a bit older sister instead of a mom. Id didn't hurt that they both are gorgeous, and very open and easy to talk to.
After a couple of drinks, we were talking openly about our sex lives, which I had thought was fine, although she mentioned hers was lacking, since her old man was out of shape and had her doing most of the work around the ranch, along with a couple of helpers that she mentioned filled a LOT of gaps in her life. She giggled when she said that, so I got the drift.
She was sitting across from me, I could see the bumps of her nipples in the thing top she wore, and as she moved around her skirt got higher and higher until I could see the white panties she had on. I couldn't help it, I felt myself getting hard. She noticed, and said, "Oh! I am sorry!" and tugged her hemline back down.
"Don't do that on my account." I wisecracked, she looked at me with one eyebrow raised and that was it. I got up, went and sat down next to her, she leaned in and kissed me. Soon I had my hand on some bare titties, they were about the same size as the wife and nice and firm.
Her hand went to my zipper, she fumbled a bit and down it went, from there it was obvious what was going to happen. As soon as I had her naked, I picked her up and carried her to the bedroom, then stripped and joined her. She pushed me onto my back, climbed on top, grabbed my erection and got it pointed and sat down.
Talk about one very energetic woman, her tits were bouncing up and down, it was one hell of a nice session. We did it again an hour later, me on top this time. They are both about even money as good fucks, my wife's mom is a bit more eager.
My wife came home that same evening, I asked her how her mom was, she said fine. Oddly, she didn't want to have sex that night, probably a good thing because I was a bit drained.
Now, when my wife plans one of her "visits" I sometimes go on one of my own, sometimes mom comes by to see me. It all works out.
Hot!