Not excited to see sister...?

Someday you will feel different as you both get older. You need to tell her about using the car and to keep cleaned up. Also tell her to put gas in it too it's only curtious if she plans to use it often. Ask her to please ask you if you are needing the car. Mostly you've got to ignore the annoying things and be a good listener. You never know when one of you will get extremely sick and something awful happens. Believe those things do happen and it is painful. Usually all brothers and sisters get annoying and agitated with each other. I came from a family of 6 brothers and sisters and many things can be nerve wracking. Learn to ignore and find something to interest your mind away from being angry. It really helps. Good Luck to you.