Quick background... Was with exH for 16 years, married 10. Have 2 kids (11 and 7), been separated 2.5 year nearly, divorce still not finalised.
I left exH after discovering a third affair. We tried to work through the first two and had counselling etc but then he did it again. Ending my marriage broke me because having a happy family life is the most important thing to me and for my kids as I didn't get this growing up. It's been a very tough few years, including exH messing with finances to cut maintenance (he's self employed and a very high earner) which ended with me moving out of the family home as I was in so much debt from solicitors trying to fight him. I have the kids 70/30.
So a few months back I leave the family home and he moves in with his new girlfriend of 6 months (she met the kids and moved in with him to his old place after just 3 months). She is also now 6 months pregnant.
Now him and I get along ok for the kids... We didn't, as he treated me appallingly through mediation (emotional and financial abuse) but I'm trying to put in behind us. My question is why do I feel disdain for his GF? He wants her to come to our daughter birthday party (at my house) and I just don't want her there. I've met her... Seems nice enough. Doesn't seem interested in our kids much and has said something slightly dodgy things to them but not out of malice I don't think.
I don't understand why I already don't like her when she's technically done nothing wrong. I'm unhappy that they have rushed their relationship and it's affecting our kids (ex told me he thinks she got pregnant on purpose) but that's on him, not her. He should be looking out for our kids...
So please can people help me to come to terms with my feelings? I want to not feel anger towards her