Selfish !

My mother in law has a 6 year old grandson from her only daughter in 2012 I had my son in 2015 & her daughter had a little girl in 2017.

So ever since my son was born she's done nothing for him. when he was born she was even excited and was late when I was in labor. she bought him nothing and never got real excited about spending time with him. fast forward 2016 October. Me & my spouse allowed his pregnant sister and her 4 year old move in with us. His mother lived 3 hrs away and would drive over every weekend to be all over her first grandson and spend so much time with him. this irritated me and I've always been hurt over it. Well now 2017 she has a baby girl & it's the first girl and of course her mother is so excited. when she gives birth she is smiling buying all kinds of things for the baby and being the best grandma. well fast forward to 2018 my son just turned 3 in april and received nothing as a birthday present but a queen size bed that she no longer needed. I'm just so over her. she has now moved where we live and is looking for a new job over here. she has been going back and forth between her daughters house and our house. when she's at her daughters house she plays and does things with both grandchildren weather it be going to the park or doing something fun. when she is at our house she does nothing with my son but play on her iPad while he plays on his iPad now this makes me angry because she doesn't ask if we want to go to the pool or the park or anything. she sits and does nothing while she's at our house. literally smokes cigarettes and plays on her phone. my spouse (her son knows his son is treated differently and decided to let the hurt and pain go and just give our son the best life. btw my son is a awesome child and he is so loving so when he sees her he is happy but doesn't realize he is being treated totally different then the other children. so my last straw was when she make a rude ass comment to me. so back story my spouse was a difficult child with anger issues and all probably stemmed from his mother because she doesn't have and of her 3 children's fathers in the picture and the kids were raised with no dad. well her daughters first son who just turned 6 happens to be very bad. he tells and screams and is rude and disrespectful and just bad. well I believe it has something to do with him needing therapy. well when I made that comment to her she came back with this rude comment saying I always wished my spouses name would have a child like that. which is ignorant ass hell considering I'm carrying his second child and am 10 weeks pregnant. I really cant stand her and needed to get this off my chest.