I played with my best friend's wife's pussy and helped finger her to an orgasm with him right there and neither of them had any idea. We were jammed onto the dance floor at a large house party. They were both pretty shitfaced. I was actually pretty sober and was dancing right next to them while they were dancing in a very provocative manner. I noticed his hands all over her sweet ass and boobs. They were practically going at it. I couldn't pass up the opportunity. She had always turned me on so much and I found myself facing away from her but pressed up to her back in a position that allowed me to get a hand up the back of her skirt without being noticed. It was perfect. I felt up her butt and simply couldn't resist getting copping a quick feel of her pussy. I managed to get my hand under the crotch of her panties feeling her amazing pussy. I rubbed my hand up and down feeling her silky smooth baldness. I felt her starting to grind into my hand, which was jammed against my buddy's leg. I was nervous they would realize but they were too drunk. As she ground her pussy I felt it's wetness on my fingers and after curling them just right I felt my middle and ring fingers slide into her body. The more she ground, the deeper they went. She shifted and kept grinding harder and harder riding my hand and my friend's leg. After a few minutes I felt her pace pick up and I heard her whisper in her husband's ear that she was going to cum. I felt her shudder thru her orgasm as she gripped him tight to her body while still moving her hips. As soon as her body relaxed I let my hand slip away from her panties and slowly moved away with my fingers slick from her pussy. I partied with them the rest of the night having a great time. Neither of them had any idea the part I played in their little dance.