I hate in laws

My mother in law & sister in law are the worst/ fakest people I've ever met. Since day 1 my mother in law has acted absolutely terrible towards me. She's ignored me, walked right past me without saying hi, she's even asked my husband if him and our 4 month old son could go out with her for the day and leave me at home. She has openly said she is jealous of me because I've "took her son" mind you her son is almost a 24 year old man with a wife and a SON! She has said (her exact words) "I'm jealous that she gets to go home to you every night and I'm jealous she gets to spend all day with Easton" (our son). She lives literally 10 minutes away and she comes to see him maybe once every other week, we don't know why. I have never done anything to her, I've never done my husband wrong, never cheated, nothing! Her son and I have been madly in love since day 1. She's treating me this way out of jealousy. Her acting like this has caused me to absolutely dispise her. She treats me like garbage and I don't think my husband quite understands how I feel and it makes me so PISSED!!!!!!!! am I wrong for saying that our son can't go without me? I say this because I'm not a child and she expects me to stay home like I'm getting punished. I'm so over it, her actions are literally making my husband and I fight 24/7 and getting pushed away from eachother.