Is my sister an evil genius or just evil

Long story short I pranked my sister a while back, nothing serious just the classic snaps under the toilet seat. She said she'd get me back.
Her and my mum went on a trip until Monday today and left while I was at work. I got home, had a shower, went to my room, everything was gone, duvet, laptop, all my clothes, everything, just my bed and what I'd brought to work left, theyd packed the car with all my stuff.

Evil, evil people