Need some advice with my in laws

Okay a back story my fiancé and I have been together for just about 4 years we’re getting married in a couple of months. Her parents are very religious my family is too. Her parents found out we moved in together a few months after we got together and they stopped talking to her for about 2 years they said some pretty nasty things but she forgave them for it. They just started talking to me about 7 months ago. Her father is very controlling. When we got together she was 19 and I was 21. Well they are happy we’re getting married and they want her aunts grandparents to come. That’s fine but here’s the thing she doesn’t have a very good relationship with any of them they are all passive aggressive and full of drama. Her grandma used to call her fat when she was 10 and would tell her she can’t be alone with her cousin because she might touch them.a lot of horrible things through out the years. I have no idea why her mom or dad never did anything to stop her grandma from saying that to their daughter. I want people who support us and are apart of our lives. They post everything on Facebook and I feel everyone would come to brag about how close they are or whatever it’s crazy. We’re paying for everything so we’re on a tight budget. I don’t have parents my side is helping out with what they can about 500 her family doesn’t have the money. She doesn’t want her grandma or aunts to come but doesn’t want her mom to be upset and her father told us he invited his mom that she doesn’t have a relationship with either. All these random people are coming out of no where. I have a few people I’m not inviting due to a bad relationship but she is more torn on upsetting her parents.