Performed by adults in a stepsibling role-play. His sexually inexperienced stepsister catches him masturbating, but instead of fleeing, she asks how he makes cum come out and begs to see it again. Wondering whether rubbing it with her hand will work, she starts giving him a handjob. When he tells her a mouth works too, she wraps her small lips around his cock. The pleasure makes him ejaculate into her mouth. Delighted that it really came out, she swallows every drop and immediately asks for more.