Wife Helps to Masturbate Me

My wife has helped to masturbate me many may times. I usually first suck her nipples while rubbing her clitoris. She then start sucking my nipple while I stroke. She is also twisting my other nipple. Many men do not know how sensitive their nipples are. I discovered it after marriage only. When I am about to ejaculate, she keeps sucking my nipple and starts pressing with her hand the area between my balls and anus to stimulate my prostate. Oh, it is so wonderful and pleasurable.