Your giantess step-mom decides it's time you and your step-sister got "the talk" and no, not the one you got at school. step-Mom wants you to learn about the fun side of sex. How to give yourselves and your partners pleasure. You're both hesitant - isn't it weird to do this with family? step-Mom reassures you that it's all natural and it's something you'll be very grateful you learnt beforehand once it comes to losing your virginities. You go along with it, watching as step-mom plays with herself and encourages you both to play with yourselves too, to find what feels right. She urges you to come closer, to get right up close to her giantess pussy to see how wet and creamy it is. You're all getting very turned on watching each other as you play with yourselves, but step-mom can't control her orgasm and accidentally slides you and your tiny step-sister deep inside her own pussy as she cums. You both know you shouldn't, but you're so turned on that you just can't say no when instead of finding the way out, your horny step-sister asks you to try putting step-mom's step-son into practice, while you're both still inside of her...