Me and my sister used to fuck. Seemed it was just a natural way to discovery of sexual function during adolescence. We were 14 and 15 with the surging hormones that spike with being the cool and popular, handsome kids in the crowd. We took our virginities out on each other and deligently prevented pregnancy. We never even came close to getting caught. Sometimes after school we'd fuck in Mom and Dad's bed, a deed that hardened my cock with the mere suggestion, and always brought Sister to a creamy froth. We would oral sex each other first, taking turns or 69ing. Then we played "MommysandDaddys" imitating their pillow talk, the sounds of spanks and pops of mouths' suction release. We have our own lives and marriages now but those last few years at home before college were very satisfying. We bonded perfectly with the love of family and each other.