The kid gets horny looking at the stepsister during the day. When the girl is sleeping the boy looks at her little tits and jerks off touching her ass and pussy. It's the same with the girl. Full of curiosity she touches the stepbrother's dick when the boy sleeps. The boy wakes up while the girl jerks off the boy's dick and she gives him a blowjob and then she puts her dick in her pussy and rides him. The boy fucks her and jerks her off in various positions until he ejaculates on the girl's torso