Im such a good big sister. My little brother just got married but his wife had to go study abroad for the summer, so Im letting him stay with me while she is away. Apparently he and his wife came to an agreement that he is to remain celibate until she returns to increase his fertility and ability to procreate. I cant believe he has to go 3 months without jerking off. I mean, he is a young and virile guy with testosterone to spare. I can tell he is itching to shoot his built-up load. So I decide to put on my tightest yoga pants and do some Pilates in front of him. I know hes always had a weird crush on me, so why not have a little fun teasing him with my ass and feet while his wife is away. All Im doing is helping him make more healthy sperm for their future baby making plans.