Step-Sis Giantess Teasing

Your big booty step-sister catches you spying on her and decides to have some fun with you. She teases you in her tight shorts, putting you in your place. A few days later, after a date she's talking to a friend on the phone, unaware you've shrunken yourself so you can creep on her. She strips out of her dress, and squats to stretch out her legs before finding you. Now you're really in trouble, little guy.

She threatens to crush you with her big ***, but gets you to make a special growth potion for her instead. She brags about how big she's going to grow and how many buildings she'll be able to destroy with her juicy *** as she becomes *** size, before sitting right on you