Bratty giantess step-sister custom

I, your step-sister, have just returned home from college and now you have to deal with me being bratty again. When you're about to leave, I ask you to rub my feet after a long day. While you're giving me a foot rub, I catch you glancing up my skirt. You are such a pervert, looking under your step-sister's skirt and there is no way of denying it because you are shrinking. Of course, I knew that you are quite a pervert, but I didn't expect you to go this far... I take off my clothes, leaving on only my underwear. Is this the view you've been dreaming about? And now that I know what a little pervert you are, I should probably mention that I've noticed how my dirty panties have gone missing. You wouldn't know anything about it, would you? I take your tiny self and give you a body tour, teasing you with my boobs and pussy, but never showing you too much. What am I going to do with you now? You can't go out with your friends now that you are so tiny. Should I put you in my panty drawer? Or, perhaps, I could leave you in the bag with my dirty panties, so you could protect them? I put you in the bag and close it. At the end of the day, I come back worried. Mum has been asking some questions about where you are and I don't know what to say. I take you out of my bag and decide to get rid of the evidence. I will just sew you into my lace panties and wet them right after. Perhaps you should be grateful that I'm doing this with my panties instead of mum's?