My wife has a very beautiful younger sister who just came from the countryside. She asked to stay at our house for a few days while waiting for the results of her job application at a nearby company. From the moment I met her, the first thing that impressed me was her plump butt, which was also an extremely harmful thing that blinded me and led me to fall into an incestuous love affair with my sister-in-law. She is an easy-going woman, so it was no surprise that when I proposed the idea of physiological satisfaction for both of us, she agreed immediately. When my wife is sleeping and away from home, we often have sex. We made love everywhere in the house from the kitchen, living room to bathroom... my sister-in-law even agreed to let me cum inside her.