How many times does Macy Divine have to tell you she doesn't want you to be home when she has her pool party! She's your older Step-Sister, and what she says goes. Besides, the only reason you want to hang around is to perv out on her and her friends in their bikinis. You of course say no, as you don't have to listen to her anymore! Macy asks you to leave one more time, and says she has a surprise for you if you don't. Of course you refuse, and Macy blinks her eyes at you causing you to slowly shrink down. Now you're only a few inches tall! But you would still be a perv at the party, wouldn't you? Macy picks you up, unsure of what her plan is as she didn't quite think this far ahead. What if someone squishes you?! This seemed like an emergency, which is the only time she was supposed to use her shrinking powers and now she can't bring you back to normal size! Suddenly, she has a brilliant idea! She's going to store you in her bikini bottoms! Smaking you around a bit, Macy knows it has to be stinky in there. She went to dance class earlier and didn't even take a shower! She doesn't think you're very secure in the front though, and wants to put you in a safer place-between her ass cheeks! She pulls her bikini bottoms away from her and sets you deep into her crack, as it's the only butt you'll be seeing today! Making sure you're really deep, Macy jiggles her ass cheeks and rubs you into her sweat. You'll be in there all day not able to see a thing while she parties with her hot friends. No matter how loud you scream nobody will hear you! Macy hopes you survive in there.