Unlike me, who's a slacker, my excellent older brother and his wife, who has never known any man other than her husband, are going to stay at our family home for a while! As a result, my sister-in-law, who is too serious and lacks knowledge about sex, starts asking me, a teenager in the middle of puberty, all sorts of dirty questions that she can't ask my brother! Reluctantly, I teach her, but her sexual desires only grow stronger! Eventually, she can't hold back her desire to try another man's dick and begs for sex! She loses control and goes wild with a self-liberating cowgirl position, climaxing repeatedly! She keeps demanding it over and over!
