This morning I and my hottest girl just had a rally of sex for about two hours ending with my three cums and her 7 orgasm. But my last cum scored zero on her. She said after her 7th that her pussy went half-numb. I felt almost no grip in her vagina after that. She was still very wet all along as usual just much less grip. We also experience first wind-passing noise from her vagina when I put my shaft all in at my last cum. We were very afriad of something wrong happen to her vagina, a torn muscle or something. But we hope it is just a tired muscle. Well, do we have to see doctor? or it is normal for a long game? Does anyone experience something similar?