Any please i need to calm down any ideas?

i'm so sick of my sister she is older than me and shes a cry baby that doest want to do anything in our trailer we got in a fight cause she never cleaned the bathroom i had to fight with her to do it so sick of this yeah i believe shes eating alot behind my back the only reason i bring this up is because she claims to be on a diet give me jokes anything so i don't blow up again at least today