I am now 40 years old. I still remember this experience I had back when I was 25.
I came home from work one night and found a different car in front of my house. I didn't pay much attention to it and went in the house alone. My wife wouldn't be home for a couple of more hours so I thought I would jerk off before she got home. I have always fantasized about having sex with my sister in law and I masturbate on a regular basis thinking of her. She is a hot blonde and is a couple of years younger than my wife.
So, I proceeded to the bedroom and get some pictures of Jo-Ann out of my secret stack and set them up on a shelf beside the bed. I have about 4 or 5 pictures of her in a bikini from a pool party. I got the pictures set up and then lube my penis with gel and start going at it. After a couple of minutes I closed my eyes and imagined fucking her. I started calling her name louder and louder and then came all over my stomach.
I just lay there on the bed spent from an exhausting masturbation session when I heard a noise. I opened my eyes and to my horror see my sister in law Jo-Ann and her friend Kristen standing besides the bed giggling. Their attention was focused on my penis that was now lying on my stomach. I quickly fumbled to cover up and told them that it wasn't what it looked like. They both started to laugh harder and harder. Kristen then asked me if I regularly wanked off to pictures of Jo-Ann and if my wife knew about this. I said no and told them not to tell anyone. They both agreed and I think Jo-Ann was still in shock about the whole idea that I was jerking off while thinking about her. Jo-Ann said that if my wife finds out she will flip out.
Then Kristen asked if they could watch me do it again. First I said no but then she reminded me that if I didn't do exactly what they wanted, that they would tell my wife. My penis was already fully erection under the covers and was now pitch its own tent. Jo-Ann was fixated on my penis. I pulled back the sheets and started to jerk off while they watched. Jo-Ann then asked if she could squeeze my balls and I said yes. The second her hand gave my testicles a squeeze I exploded in orgasm all over her hand and my stomach. She continued to squeeze my balls I nearly pasted out.
Kristen then started to give me a hand job while Jo-Ann continued her death grip on my left testicle. She seems to enjoy that I was in considerable pain. And me I loved it, it was better than my wildest fantasy. Within 2 minutes I came again. The girls then wiped my cum all over my chest and went to clean up and then when to the living room. I cleaned myself up and then also proceeded to the living room. Both girls smiled when I entered the room and Jo-Ann told me to sit on the couch at the other side of the room in the nude so that they could look at the penis. I did and they giggled and teased me for another 20 minutes until my wife came home and I went to the bathroom to clean up. True to their word they didn't tell my wife. I only see Kristen once in a while as she still lives out of town. As for Jo-Ann, she asks me to masturbate for her 2 or 3 times a year since we live in the same town.
More stories to follow.