So a few years ago I (M45) wife (41) were visiting Mil (65) for a week during the summer. Mil lives in the country and has a huge hot tub out on the deck. Wife knows I think her mom is hot and I would love to fuck her, But it’s just fantasy talk for now. So after dinner one night the kids wanted to go in the hot tub so everyone changed to go in except Fil (59) who was always busy. We all hung out for awhile talking and joking and I was trying not to stare at my mother-in-law‘s 38 double D tits. She is 5’1 maybe 140, huge tits, tight ass and a camel toe she loves to show off.

After about 45 minutes or so the kids were ready to get out, so my wife got out and got the kids out to go in and change for bed. Mil and I stayed in relaxing. While sitting there talking with her, I got the urge to be a bit wild and I pulled my cock out and was slowly stroking myself. The bubbles kept me hidden enough that you couldn’t notice unless you were really looking. I was so hard and turned on knowing she could possibly catch me.

We had, had enough of the hot tub and Mil stood up in her black one piece. the water made it suction to her body, giving me an exceptional view of her. As she stood there using a towel to wipe the sweat from her face, mine was right next to her crotch and her tight suctioned bathing suit was accentuating her pussy. It had suctioned tight enough that I could see her lips and clit clearly and her whole right lip had been pushed out the side. Once she finished wiping her face, she draped the towel on her neck and reached both hands to the leg area of her bathing suit to release the suction and did not care I was sitting there with a perfect view of her.

As she slid her fingers into the top back of her suit and slid them down revealing her tight ass. As I’m watching intently her hands move straight to the front and without hesitation she slide her thumbs in the front and proceeds to pull her bathing suit away from her pubic mound as far as it will stretch. At this point I’m fully staring don’t even care. As she slides her thumbs downward ( still stretching the material out) to reset it she pauses and I have clear view of her pussy for almost a full minute and a half.

As she lets her suit snap back against her body, she looks down and asks if I’m going to get out? I hesitate because I am hard as hell and know I can’t hide it. I adjust myself best I can and stand slowly and try to act like nothing is up. Trying to paying attention to see if she notices it without her seeing me look. She glances at me quickly and does an immediate double take. I am much bigger than Fil. ( I’ve seen him fully erecte, another story)

As I’m wiping down she is staring at my cock. We are out standing on the deck wiping down a bit and I say I’m going to smoke before going in to change. Dick still rock hard and her trying to get a look. She wraps the towel around her and heads inside. One thing about my Mil’s house is she never closes curtains or blinds, even when she showers or changes it’s always in full view of the windows. As soon as she has disappeared from the entrance, I run off the deck and around the house to where here bedroom is and wait about 2 minutes before the light comes on.

She walks in and half closes her door and walks to the foot of her bed lays the towel down and starts removing her bathing suit. She removes her shoulder straps and pushes it down to her belly, exposing her beautiful breast. She grabs the towel and is wiping them off, lifting them to get underneath. Really showing them off. I’m so excited that I’ve get my cock in hand and start beating it like it owes me money. She drops the towel and starts pushing her suit the rest of the way down. She has a very well maintained bush, super big and hairy but kept tidy. You wouldn’t expect a bush that big.

As she is standing completely nude she wipes the rest of herself off and just stands there for a minute before walking to her dresser to get clothes. In her moment of pause I started to cum so hard the first rope sprayed on to the window. I got a bit nervous she’d catch me when it hit and made a splat sound. I felt like I was cumming forever. After I finished spraying my load on her bedroom window I ran back to the deck smoked and then went inside to change. I have been able to get a show from her almost every time we are there without anyone knowing.