Your sister then starts talking before your mom stops her "i wish that my sister was my little play thing!" She said sadistically, you then suddenly appeard in what looks to be a dungeon but on a soft bed, your ankles and wrists chained to a wall. Your sister suddenly grew to be bigger than you, slapping you across the face before holding you down and fingering your pussy softly, you moan desperetely but love this. She edges you over and over again until you're mind stops working, you can only think about obeying her.
She fingers deeper and you moan, then snuggling up with you under the covers, she still doesnt let you cum. She orders you to cuddle, you do so submissively.
She smiles happily and nibbles on your ears, pulling your diaper back up. "Good little slave~". You feel her nibble your ears and you go limp, loving it.
She runs her finger up your back, giving you a shiver as she lays into you, cuddling up under the covers and hugging you like a plushy. You let her do this submissively