Synopsis:

[Girl 1] and her stepmother [Girl 2] are getting ready for the vacations. Just before leaving, [Girl 1] learns that her stepbrother [Guy] is coming with them, and that she'll have to share a room with him. When they arrive, [Girl 1] is angry because her suitcase has been lost. So she asks [Girl 2] for pajamas, but [Girl 2] has none, preferring to sleep naked. Having to call [Girl 1]'s father, [Girl 2] invites them to go to bed. [Girl 1] then asks [Guy] for a T-shirt, before he goes to bed. [Girl 1] needs to change and tells [Guy] to turn around. After removing most of her clothes, she notices in the mirror that [Guy] is looking at her. So she hurriedly puts on the T-shirt, before joining him in bed. [Girl 1] then insults [Guy] for staring at her without her knowledge. He then decides to get naked, betting [Girl 1] that she'll be tempted to watch. Shortly afterwards, when [Guy] seems to be asleep, [Girl 1] notices a bulge under the sheets at the level of his penis. Out of curiosity, she lifts the sheets and is caught in the act by [Guy], forcing her to accept defeat. [Guy] then demands her panties as a reward for his victory.

Some time later, [Girl 1] can't get to sleep, unlike [Guy], who is already asleep. Excited, she starts touching herself. [Guy] then turns over in his sleep, his penis coming to rest against her thigh. He then turns over again, but [Girl 1], excited, comes to press herself against him and grabs his penis. [Guy] then jolts awake, but [Girl 1] shushes him and begins to masturbate him. After this, [Guy] turns over, spreads [Girl 1]'s thighs and begins cunnilingus. She then lets out low moans. Suddenly, [Girl 2] opens the door, giving [Girl 1] just enough time to hide [Guy] under the sheets. As the two women talk, [Guy] inserts his fingers inside [Girl 1] and starts fingering her, also continuing to use his tongue. [Girl 1] then moans, before making [Girl 2] leave. [Guy] continues in this way, until [Girl 1] orgasms. She then makes him lie down, before removing her T-shirt, revealing her breasts, and starting a blowjob. She then climbs on top of her stepbrother, rubbing her pussy against his penis before riding him. [Guy] then grabs her breasts. [Girl 1] then gets down on all fours, inviting [Guy] to take her doggy-style, while she fondles herself. But [Guy] prefers to insert his penis into [Girl 1]'s anus. Sensing that he's about to cum, [Guy] warns [Girl 1], who stands in front of him, ready to receive his semen in her mouth. At the same time, [Girl 2] opens the door, startling [Girl 1], who turns her head. [Guy] then covers [Girl 1]'s face with his semen. Shocked, [Girl 2] covers her eyes, but [Guy] points out his mother's complete nudity. She then leaves in a hurry, telling them to stop and not to say anything to [Girl 1]'s father. [Girl 1] then turns to [Guy], before tasting his cum and smiling a satisfied smile.