My big sister is unbearable..She is the epitome of depressing, please HELP!?

i think when something like this happens, you must do your best to protect your niece. children that undergo such tragedy may be severely affected even though they hide it. i think you should talk to your niece and maybe council her even become her best friend. as for your sister, take her to therapy for sure or she will become a good a parent as michael jackson.