- It's cheeky, but in fact, my super gentle sister-in-law couldn't see me who was worried about virginity, and she let me have virgin graduation sex with "It's okay if you put on rubber"! But I didn't know how to adjust it, so I shook my hips like an idiot, and the rubber was torn in the vagina! I thought I was there all the time, but my sister-in-law seemed to notice it halfway through because it was too comfortable. But as a result, I had a forbidden continuous vaginal shot ... I put out too much sperm! Sorry! Forgive me because I'm a beginner!