We lined up along the wall in the shallow end and we both counted down… 3, 2, 1! However, as soon as we got to one, she leaned over, knocked me off balance and started swimming. I called her a cheater and tried to catch up but she kept a sizeable lead to wall at the deep end and handily beat me back to the starting wall. I gave her some more shit about cheating and told her I was going to drag her and throw her back in the deep end; she turned around and held onto the wall telling me that I wasn’t. Without really thinking about it, I came up behind her, wrapped my arms around her waist and started trying to pull her off the wall. While I was doing this, her ass was inadvertently rubbing against my dick which started to get me hard. She must have felt it because she stopped moving around pretending to struggle, reached her hand back and grabbed my dick through my shorts; I froze!
I thought for sure I had just made a huge mistake, but she just started tugging at my erection through my shorts without saying a word. It felt so weird but so good at the same time, I started processing the situation… my wife was out of town and her mom was rubbing my dick in our pool. After a few moments of this, I let out a quiet moan and started breathing more heavily; she briefly let go of my dick, but readjusted her legs and pulled her bottoms down to reveal her bare ass. It was incredible… big and round, but firm with nice tan lines.
I was lost in admiring my mother-in-law’s naked ass when I heard her say in a hushed voice, “Fuck me.” I shook my head, not sure if I heard her right… but she looked back right at me and repeated herself playfully… “Come on, I know you want to, just fuck me.” I didn’t hesitate, I pulled my board shorts off completely and started to rub my raging hardon between her legs until I felt my head slide into her pussy. I’ve said this before, I don’t have a monster dick by any means but I’m still almost 7″ and much thicker than average and I don’t think she was expecting my size because when I pushed all the way in, she jolted and moaned “Oh Goddamn!” pretty loud.
I couldn’t believe it, I had to pause to take it all in: my mother-in-law was bent over in our pool with my cock buried inside her. I grabbed at her ass and started fucking her a good pace; she would let out a moan every time I thrusted all the way in and started to say my name which just made me pick up speed. After a couple minutes of this, I slowed down, reached up and pulled the ties loose on her bikini top; it fell into the water and I reached around to begin feeling her tits. Holy shit, they felt amazing. I didn’t know what to expect since they were fake but they felt great and pretty real; her nipples were big and hard so I started playing with them while I picked up the pace in fucking again.
We did this for maybe five minutes total before her legs started quivering and she told me to stop so I pulled out and backed up. She stood up, turned to face me and said, “Damn, you have a nice dick!” She stepped close to me and we started kissing pretty passionately; her lips felt soft and comforting. She reached down, wrapped one of her hands around my still-hard dick and started pulling me out of the pool. Slowly, in between deep kissing, we made our way onto the couch in the living room where I laid her back, knelt in between her legs and started eagerly lapping at her soaked pussy. It was honestly so weird and hot to be thinking about licking the pussy my wife came from but it also felt empowering to be pleasuring her mom while she was away and had no idea (yet).