Grow up.
Background info: piseces are said to be royally pissed off when someone tells them to grow up. Thelma is pisces and her sister is Leo.
Tina grabbed Thelma by the hand and led her into a quiet room away from all the party guests. She looked around to see if there was anyone close enough to hear her scream at her little sister. Once she was sure no one was around she shut the door and turned to Thelma.
"Grow up!" she snarled narrowing her eyes.
"I don't want to," Thelma said in a quiet yet firm voice.
"Well you will eventually-"
"-Yes! But not because you told me to! I don't have to grow according to your standards or just because you feel too 'grown up' to like the things I like. Cause when I grow up I'll grow into a person I'll have to live with for the rest of my life. You won't have to deal with the pressures I feel when I do, so honestly me growing up is none of your business. If I'm too much of a child for you and you don't feel like babysitting, you're free to leave and go hang with the 'big kids'." And with that said, Thelma stormed out of the room.
"Pisces...." Tina muttered under her breath.