Some kind of weird panties

Zoe tosses a pink paper bag on your lap. You read the shop's name written on it. Wait... you recognize where that bag is from. It's from a sex shop!

"Go on, open up." Zoe simply tells you. It honestly disgusts you to even think what she has in mind. You think about defying her but decides there will be a better time for it.

Scared of what you might find inside, you stuff your hand in there with care. You feel your fingers scrape what it seems to be a piece of fabric. Pulling it out reveals to you a pink pair of panties.

"Another pair of these?" You don't try to hide your confusion. Your sister giggles at your cluelessness.

"Look again."

You do, and you notice that this is no ordinary female underwear. There's a dildo attached to it. You drop it with disgust like it's a shitstained piece of laundry. Zoe can't hold herself anymore and starts laughing at your pretty face.

"I am not wearing that!"

"Little sisters should be more obedient, you know..." Zoe calmly waves the gun just out of your reach. "Specially if they want to turn back to normal."