I gave my sisters, who were always fighting and didn't get along, a forbidden aphrodisiac and forced them to become lesbians, and we managed to make up! But maybe the aphrodisiac worked too well? I got a full erection from the two girls' overly erotic lesbian play, and they found me and pulled me in, rubbing and licking my sisters' sensitive big breasts! I took turns poking into their slippery double pussies! I knew it was wrong, but I gave in to my desire and ended up having a forbidden threesome incest.