When my sister-in-law asked me if I could lend her my pussy for a little while, I said jokingly, "I'll lend you my dick if you want," but we couldn't back down and ended up lending each other our genitals! A word that my brother and sister-in-law, who are not having sex with their boyfriends or spouses, said as a joke turned into a serious situation... My sister-in-law was shy and hid her face and body the whole time, but I was really excited by her sexy body...