Sick of my daughters?

I am a single dad since my wife killed herself a few months ago. i am sick of cleaning, laundering, telling stories to, diapering, etc my two daughters who are 7 and 8 (yes neithger one has been potty trained due to their mother's negligence while she was alive) they are loud, obnoxious and they never shut up at all, i even saw them drinking last week. i told them to stop but they kicked me in the knee really hard and i fell down. thety cry anytrime i refuse to take them somewhere then they say they'll kill themselvbes like mommy did, and i tell them fine go ahead i won't miss you two sluts either (my wife was haviung an affiar when she killed herself) i know these two gitls have been through a lot and i love them but they're too much, should i send them to their aunt's? they get along well with her and i feel like i'm not doing them any good. any advice?