My older sister, who is several years my senior, came back home after many years. She still treats me like a kid and forcefully invites me to take a bath together... "You won't get any girls if you don't clean up," she says. She's too caring and even peels back the foreskin to wash it for me. But seeing my penis, which has grown bigger and harder than before, her eyes turn lecherous. My sister's hand job bath makes me ejaculate violently! Seeing my penis and semen that have grown into an adult during the time we haven't seen each other, my sister gets aroused, and we cross the line between siblings to become a man and a woman...!
