Family issues

Are you saying only invite her and not her kids? I would say just invite her then. It’s best to stick to the rules that you set for things like that because people get weird(can’t think of a better word to describe it) about their kids. My family still talks about how *some* kids were invited to this wedding or that wedding but not others. You still have a good bit of time until the wedding though. Maybe another family member like your FH’s mom could convince her to let the girls be a part of your day.
Or are you also saying only invite his sister to the ceremony but not the reception? I think if you invite her to the ceremony and everyone else is going to the reception after, she should also be extended the invite to the reception. I know you already had a falling out but that’s your sister in law and only inviting her to one thing will make for bigger problems later. If you think she’ll cause a problem or scene, don’t invite her at all but definitely make sure your FH is on board.

Your question isn't super clear. If you want your nieces at the wedding and their mother won't allow them to participate, you can still invite them. There's nothing wrong with inviting immediate family's children only and no one else's.

If there will be someone to care for the kids while at the wedding, then I say sure. But, as we all know, women can be petty. To keep things on track for the wedding and avoid the possibility of her deciding to remove her kids last minute, I would invite her. Also, I hope you and her can work it out. She is (was) your best friend. Good Luck

Hi there!

Welcome to the WeddingWire community!

I’m sorry to hear that you and your FSIL had a falling out.

Perhaps give it some time and see if the relationship improves. If so, ask again and she may be more willing to let them be a part.

If your wedding is adult only, and no kids are allowed, you may just have to invite your FSIL without her children.

I really hope this situation resolves favorably for you