My (24M) gf (22F) have been dating for 7 months now. She's a sweetheart and I absolutely love this girl. One major problem is her mom.  It's a long story but in short she doesn't work, doesn't drive, and makes my gf do everything for her.  Gf's mom had a house foreclosed on her and my GF took a mortgage in her name.  Tha'ts another story all together but necessary to set the stage.

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Here is where AITA comes in.  About 3 months ago, I was curious as to why my gf and I didn't put anything on Facebook about how we were dating or mark it as "in a relationship with xxx".  She was adamant she doesn't use Facebook and that its old.  Huh okay I get that, a lot of people trended away from that and she is always on IG.  Anyway curiosity got the best of me and I found the Facebook.  The most recent activity was while we were dating and it was one of her older pics on IG uploaded with some caption I knew my gf wouldn't write. Well I brought it up to my gf and she said her mom has the account and looks on there. She's known of this and let it happen.  I told her it wasn't okay and made me uncomfortable.  I asked to have it deleted but she said she didn't want to fight with her mom over it. 

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I understood and let it go.  Until last night she mentioned a story about how her mom had just shown her messages from kids she went to highschool with dming her being typical creepy in her messages.  She says her mom ignores it but this was past my boundaries and really upset me.  I got really mad and told her that this needs to stop and it needs to be deleted. I made her text her mom right then and get rid of the account. Its still there....

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I looked into it more and did some grade C detective work to see if she used the account (she didn't accept my friend request from months prior).  I looked at some of the likes and checked those account's profile pictures to see if my gf's name appeared. Shocker... they did. I got absolutely furious about how this makes me look and how this needs to change or our relationship will not continue.  I don't want to put my gf against her mom but she is abusive and its ruining our relationship.  So reddit, AITA for being pissed off that my gf doesn't change the dynamic with her mom and me taking it out on my gf making her feel shitty over this?