I cant stand my mother in law (need to vent)

My husband is in stage 5 kidney disease. About to be put on dylis and is about to be on donor list. we get no help what so ever with our two year old from his mom. My husbands sister (older one) does drugs and has for years ... shes decided to do drugs over staying clean to be there for my husband to see if shes a match. His sister has also don drugs in our house and lied about it. Yet she decided to get pregnant on methadone .. she just had her baby and by the way the baby has been in nicu for a month due to with draws.. now my mother law is with her 247 and hasnt had anything to do with our son what so eve since hes been born.. Today is my husband birthday and his mom didnt even want to do anything with him to celebrate but is now spending time with her daughter and her baby instead. I just dont understand! All his mom says is we have eachother and she has no one. We still need help. Im 24 and he just turned 26 today so she's so young to be going through this and wost of all he feels his mom isnt even there for him.