Sister played another prank?

i was in the shower wen my mom said she was going to a party and said that my twin sister (13) and her frend were in ther room i said ok then finished my shower i dried off in the bathroom then went to pee(our bathroom has a tink room with just the toilet so wen i went in my sister came in and took my towell from the sink and replaced it with her pink easter dress then ran out and shut the door i then came out and realized wat she did i ***** go out naked becuz of her frend so i put on the dress(to me embarrment) and i walked out to my room to find that the girls took all my clothes out of my room while i was showering they came in laughed at my dress(and called me pretty)and said they left my clothes outside so i went out there(my clothes werent there)and they locked me out wearing that dress(and our yard has no where to hide)so they said through the top window that if i told mom we wud tell her u were messin up my good dres. these girls from skool were out ther calinmea girly sisy