Im baby sitting my baby cousin ( 6 months ) and my other cousin that i live with ( 7yrs old ) is…

Im baby sitting my baby cousin ( 6 months ) and my other cousin that i live with ( 7yrs old ) is running around all in her face touching her face, toys, pacifier etc screaming while she is sleep pulling her falling on the couch scarring her etc etc etc. Im like if this is how its going to be when i have my baby i dont think i will be able to stay calm this is ridiculous.