For a bit of back story, FH was dating this girl, they got engaged hastily, she found out she was pregnant, they had a little girl, and she cheated on him and left.
So, they don't have good history. I'm trying to help them form a somewhat decent co-parenting relationship for the sake of the daughter, but it's hard.
When he told her that we had become engaged, his ex mentioned wanting to be invited to the wedding, and even extended an invite to her potential wedding in the future (to her now boyfriend).
I want to help them be somewhat decent to one another, and have the ability to be in the same room for things like the daughter's future graduations, but I also think it would be awkward.
I haven't said yes, no or maybe to her.
I need some advice.