My mother-in-law had bought a new house and had asked me one day to go with her to the local home center to pick out some fixtures. While we were there, she went to go use the bathroom but came back out quickly saying that it smelled so bad in there and would wait until she got home. On the drive home, we got stuck in some traffic and after a while of just sitting there I could tell she was starting to squirm a little. I didn't want to say anything to make her feel embarassed, so just watched her wiggle out of the corner of my eye. Then, she laughed and said that if the traffic didn't start moving soon she may have an accident right there in the car. We started joking around about it and she was trying so hard not to wet herself from laughing. I figured I'd ease her by saying, hey if it happens it happens. No big deal, I won't tell anyone. She said it may just happen but, didn't want to drive the rest of the way home in wet pants, nor ruin her car seat. I asked her if she had anything in the car she could sit on. She told me there was a beach blanket on the floor in the back seat and maybe I'd better grab it for her. I grabbed it and she managed to slip it underneath heself.
I couldn't help but to look at her. I was so hard from seeing her so desperate.
Then I heard that 'hissing' sound as she started to pee. A dark patch spread downwards in her chrotch.I got rock hard. Right about when she finished, the traffic started moving slowly again. She said, oh great now I have to sit like this until we get home.
I told her if she wanted to slip her pants down I would look the other way. She went ahead and unzipped and was trying to get her pants down without losing her panties at the same time but, her panties were going with the pants.
Finally she says, the heck with it and lets the panties go down with the pants. She took it all off and put it in a plastic bag.
I couldn't help but to look at her bush. She just laughed and said, I thought you weren't gonna peek? I turned and looked out the window.
She said, sorry you had to see all that. I said, don't apologize. When you gotta pee, you gotta pee. Then for some reason I admitted to her that the whole ordeal was actually a turn on. She said what, seeing me half naked, or me peeing? I said, both. She said, you mean to tell me you have an erection now? I said, isn't it obvious? She looked over and saw I was bulged.
She laughed and said, I guess maybe you need to do what you need to do now then. I didn't know if she was serious, so I asked her if she minded if I did go ahead jerk off. She said, hey if I can sit here bare assed and wet myself in front of you, you can certainly do that if you like. I thought that was really cool of her to let me, so I stopped the car at the side of the road, dropped my pants down and started stroking off.
Out off the corner of my eye, I saw her putting a hand between her legs, as a soft moan escaped her lips.I turned my head and stirred between her legs. She said she never watched anyone masturbate before and enjoyed it and didn't feel so embarassed herself now. She seemed that she was unaware of her hand moving between her legs. I felt my orgasm getting closer, so I closed my eyes to concentrate. Right after I came with a groan and shot my semen right at the window.
As I turned my head, I saw my mother-in-law looking from my dick to the window in amazement.
-My goodness, was all she could say. Her hand did a couple of quick movements between her legs, as an act of reflex to my cumshots,I guess and then, as a lightening out of a clear sky, an orgasm hit her. She cried out in surprise and delight, as she looked at me, and the her body started to shake while her legs clamped around her hand in her crotch.
-Wow, I said afterwards,as I started the car and continued our ride home.
-I am a little embarrassed, she said, but I told her that she was a fantastic woman and should not feel bad about it. I told her how much she had turned me on.
She then said, anytime you want to watch me pee and I can watch you do that, is fine with me. It'll be our secret. I told her I'd love to see her masturbate more or pee for me. She said sure, we could have some type of fun together as long as we didn't end up making love. The rest of that afternoon was very enjoyable for both of us.