My story began many years ago, when my daughter met my son-in-law, I would say I was going to bed and leave them alone for several minutes.
I would then sneak into the room next to them, and watch them through a frosted glazed door. I would stand in the dark, and masturbate while I watched them.
One time after they had finished having sex, my son-in-law looked towards where I was standing. I stood still, he walked over stroking his cock, stroking faster and faster, as he did this I was thrusting two fingers inside myself, and was biting my left nipple. As he ejaculated over the glass door, my own legs buckled as I came, I fell to the floor panting. He walked away, and I went to bed, I never did this again.
Tweny years later, at home alone with my son in law, we had been to a family party and we began to talk about my old house. We talked about sex, masturbation and places we had had sex. He told me he used to enjoy having sex in my old house, because I used to watch!
I felt myself blush, and at first denied it, he then told me after I had gone to bed he would go to my laundry hamper, take the panties out and masturbate in them. I told him I had never noticed, because when I took them off on those nights, they would be soaked from my own juices. I then realised I was sat there in front of my son in law, moving my thighs together making my pussy wetter and wetter. I looked at my son in law, his cock was erect I could see it through his trousers. My breathing got faster and faster as we continued to talk about sex, and I continued to move my thighs together.
At last I had a fantastic orgasm, in front of my son law. He asked me if I had enjoyed that, he knew what I had been doing. I went to the bathroom took off my white lace panties and placed them on top of the laundry hamper. My son in law stood up and said he was just going to the bathroom before he left, I knew he would see my panties. I followed him and stood outside the bathroom door, within seconds I could hear the sound of a cock being wanked, I thought of him wanking into my panties. I put my right hand up my skirt and stroked my clit, my pussy was sopping wet. My son in law was now wanking very fast, I thrust two fingers inside me. After only a few more seconds he came, I ran to my bedroom. I had not come yet I had never felt like this before I needed to come. I lay on the bed, and out of my pantie draw pulled out my 7' black dildo. Thrust it up my pussy and pulled and played with my clit, I came in seconds, both legs cramping up as I came. I went downstairs but my son in law had gone, I looked in the bathroom, and on the laundry were my white panties soaked in sperm.