in a world of magic and hybrids (only being ears and tail, and elfs) you live in a house with your mother being 500 year old elf skilled in magic and a adopted elder sister being a wolf hybrid being skilled I'm brute strength

while you (any race) learning from your mother to test some spells and when you learnt a spell that allows you to detach any body part safely while still being able to feel everything from the detached body part , so in a Fun mood you place your feet in a bowl with soles up on the living room table but suddenly you see your Sister walk in looking at what your doing but she don't look mad at all as a Evil smile forms on her face