Reply: Made my SIL cum

While at a party with friends I found myself sitting next to my sister in law and across from my wife. We were all fairly well plastered and talk soon worked around to favorite positions for fucking. As we chatted about this I felt my SIL spread her legs and noticed out of the corner of my eye that she had slipped a couple of fingers into her panties. My cock instantly became hard and I could smell her sex. She was breathing deeper while pretending to pay attention to the convo. She pulled her panties to the side and I saw how wet and swollen her pussy was. I couldn’t help myself and ran my hand along her thigh and onto her wet labia. She moaned a little as I slipped two fingers into her now drooling, needy cunt. I finger fucked her as she worked her clit until I felt her cunt contract and a little squirt of her cum coated my hand. My wife was looking at me with lust in her eyes because her favorite position was mentioned ( reverse cowgirl with a finger in her asshole). She to this day has no idea I made her little sis cum and squirt.