FH's cousin had been dating a girl for over five years--they lived together, had a kid together, and we all assumed it was only a matter of time until they got engaged. I didn't think twice about adding her to our wedding invite list, and when my MOH asked for a list of FH's family members to invite to my shower, I put her on it. Well, we found out right after my shower invites went out that she and FH's cousin are no longer together. I thought she might decline considering the circumstances, but my Mom just told me that she actually RSVPed yes. I'm really appreciative that she's still coming, but now I'm not sure whether or not to invite her to the wedding. She's a very nice girl but we don't have a relationship with her outside of FH's cousin. I feel like it would be awkward for FH's cousin and his family if we invited her, but it would be rude to her if we didn't. Any advice?