Thirteenth Short: First Party Fuck for Wife

My wife went to a party about two years ago, was dancing with a man and he had a huge erection and was pressing into her, they went out the back and she let him play with her boobs, she got very horny and she let him finger her, while she was pulling him off, she was going to stop after the finger, she let him press his erection against her panties, but she had past the point of no return!! held her panties to one side and let him slip in, she has been doing it on and off for the past two years, I don't mind because it makes her extremely horny, and I benefit.