I engage in sexual activity with my wife's sister during a shared nap time

I was lying on the couch with my wife when her sister joined us. I was tired and wanted to sleep, but her sister had other plans. She started kissing my wife, and soon they were both undressing each other. I could not resist the temptation and joined in. We had a wild threesome, taking turns pleasuring each other. The sight of my wife being taken by her sister was incredibly arousing. I found myself lost in the heat of the moment, fucking my wife while her sister watched. The intensity was palpable as we all reached our climax together. The air was filled with our breathless laughter and satisfaction. It was a perfect way to unwind after a long day.