i want to bite people

i (16f) love my sister (9f) so much and i always want to hug her, squeeze her, and just cuddle forever. and also i want to bite her. especially when she has her arm/leg close to my mouth i cant help but just go for it. she tells my mother and my mom gets angry with me for that. today i was with my grandma and i said “i always wanna bite my sis but she doesn’t allow me, can i bite your arm?” (she has a very soft and big arm which is wiggly and so fun to bite) she laughed and say “what are you a woof woof?” and we laughed. then whrn i was leaving i was like “can i bite for once tho pls” she was like “fine” and i bit her arm and she screamed. yeah that’s the story. i just wanna bite people because its so soft but nobody allows me to. when i bite myself it doesn’t feel as good. idk what to do