I hate her

long story... my husband is the most amazing person I know we got married last year but been together for 7 and have a beautiful 6 months old. well about 2 years ago we moved in with the in laws to save for our house, my SIL also lives there, let me tell you ever since I got pregnant my SIL has made my life hell now with my son here is hell and beyond. some of what she does: my early pregnancy she put pure Clorox in the bathbut and closed the bathroom door right before I was going in to shower (she claim was to clean but she knew better), I had a pregnancy scare at 19 weeks not ones she asked how I was instead she posted a picture on Instagram of my unborn child quotting "i can not wait to hold you, kiss you, play with you and blah blah blah " EVERYBODY congratulated her thinking was her child she loved the attention after 2 days clarified and deleted the pic, right after I deliver my son she forced her way into my delivery room, she calls me nasty, hates my husband, is disrespectful, with my baby here she is SOOOO, inconsiderate. what bothers me the most is that my MIL knows and covers for her. BUT GUESS WHAT we did save for the house and expect to closed on it in 1 month

I can't waittttt please say a prayer for us, we need everything to go well so we can closed on the house and move out.