I’m in this situation .. I feel like I want to leave !

Hi I will try to make this real short! So A couple of months back my sister and my sister and law gossiped about a relationship problem my husband and I had ( before he met me he was talking to a women who stated she was separated but in fact wasn’t) so I called my sister and law out , I mean I didn’t yell scream or anything just asked why she would go out of her way and tell people about my business! Well she got all offensive yelled screamed at me told me to forget she was my sis and law and her husband was my brother and law blah blah! So ok whatever I blocked her showed the conversation to my hubby ( it was through WhatsApp audio) My husband says to ignore her and said I was super nice to her ! Ok so now her baby shower is Saturday I don’t want to go my husband insists I go I told him no sent him the audio to refresh his memory! So all is good I told him to go but at the same time I’m upset I was treated like shit he stated he would not go with out me!!! so now I walked in on my husband talking to his brother and over heard him saying that women would be there! And he will be attending!!! Wtf is all this about!! I’m just about had it! 😣😠