Your stepsister comes home from school one day, panicking about some guy that she swears is stalking her. She's obviously terrified, but doesn't want you to confront him. She knows how defensive you are and that your first reaction would be to fight him, but your record can't handle another suspension! So, she came with a backup plan. It's... a little unconventional, she warns you, because she found it in a hentai. You didn't even know she read stuff like this! But besides that, is it even possible?? Your stepsister shows you two rings she found that are supposed to contain the power to swap bodies. You're hesitant and bewildered... but you put on the ring. And it works. You wake up in your stepsister's body, immediately feeling the difference in your shapely curves. You go to school and expect to immediately find the person responsible for tormenting your stepsister and find... nothing. The day passes by uneventfully. Once you get home without noticing anything out of the ordinary, you let your guard down and start becoming curious about your stepsister's body. You strip naked and take in the sight: you had no idea that your stepsis looked THIS good naked! Her tits are bigger than you thought... and so is her ass. Her skin is soft to the touch as you slowly work your way down with your hands and feel that you're getting turned on, her pussy is soaked! You start to touch yourself as you look down at your stepsister's body, and begin to wonder if she might be doing the same. Just as your head starts to fill with taboo fantasies of what you might be able to do with this new power, the doorbell rings. And you immediately know that it's him. Preparing yourself for a fight, you open the door to confront him. But he gives up surprisingly easy. He says that he completely understands and that he'll stop pursuing you, and all he wants is a handshake before he leaves. It seems like a strange request for him to make, but you can't see any harm in it. You reach out and take his hand, and before you know it... darkness. You wake up confused, dazed, and feeling something strange. The man at the door who shook your hand is standing over you, and immediately you realize he must have done something to your stepsister's body. He pulls you toward him, and as his skin touches yours, that strange feeling starts to become overwhelming. It's almost similar to what you felt when you were exploring your stepsister's body, only a thousand times more intense. But this can't be.... how could you be getting excited for this? He touches your stepsister's body like he knows it must be turning you on, and soon you can't control yourself, you hump his leg like it's the most important thing you've ever done. Next, his cock is in front of you and you're using your stepsister's mouth to suck it, making you more wet than you knew it was possible for girls to get. There's only one thing left to do... and of course, you spread your stepsister's legs as he slowly pushes his cock in, and even though you know how wrong it is to letting him take your stepsister's virginity, you're too horny to stop. You never knew sex could be this good! He reveals to you that he put a succubus tattoo over your stepsister's womb to make you go absolutely feral, so that with each touch you'll become more hopelessly addicted to his cock. You're gleefully sucking his cock, giving him a titjob, and letting him use your stepsister's pussy over and over again to his satisfaction. She has no idea, but you've just signed her up for being his little cumslut!