R*** takes many forms. For me it was a random one off experience. Was home alone in the shower having a desperately needed stroke off and did not hear sister in law when she csme to our house. Decided to prank me by jerking open the shower curtain and yelling surprise but surprise was on her obviously. I was startled but was too close to finishing so kept a grip on my c*** and balls. She was stunned and wide eyed. She finally managed to blurt out that she would leave me to my privacy and I smarted off that she did not have to go she could stay and watch or even join me. She stood staring as I resumed slowly stroking. I was surprised when her hands strayed under her tshirt and bra, and more so when one slid down into her waistband. Her eyes stayed glued to my m***********. But she really surprised me when she suddenly yanked off her clothes and stepped in with me. I was unsure of what was going to happen when she got on her knees. She looked up almost scared and asked if she could watch me c**. I did not need to be asked twice. She masturbated kneeling there as she watched me stroke trying to draw it out but it was so f****** hot i could not last forever. I did not assume she wanted me c****** on her so i warned her, and she leaned back on her hands and just looked up at me and i lost it. All over her from breasts to navel. I nearly blacked out. She put her hand back between her legs as she stared down at my c** on her skin. I no longer existed. And then I reached out and down and pulled her hair forcing her to look up at me and just blurted out commanding her to stand with her feet wide apart. Literally began pulling her to her feet. I did not give her a chance to resist. I went to my knees and grabbed her hips and shoved my face into her and started hungrily devouring her. All she managed was a weak “oh f***” and she put a leg over my shoulder and began grinding her hips into my mouth. Loudest I had ever heard a woman when she cums. I stood up dizzy and we both managed to dry off and get clothes on. There has not been any more between us but she has texted me randomly a few times to say she was thinking about that day in the shower. I have told her it was the same for me. I have even pushed for a repeat experience without anything more and she has said she has been seriously tempted. But I also recognize that it is something that happened because of predatory behavior on my part. Manipulatively suggesting she stay and watch or join me. And i did not give her the chance to consent when I shoved my face between her legs.