When I told the kind big-breasted older sister who never gets angry no matter what I do, saying, ``I'm the only virgin in the class,'' she decided to let me have sex with her as long as I just rubbed her! - As I, a virgin, was extremely excited and was desperately rubbing my dick, my sister's pussy started to get wet... "I think I'm going to put it in, so please stop!" - But her hips don't stop and she inserts it raw! - Of course, the kind older sister forgave me, so I got carried away and ejaculated over and over again until the sperm dried up!