DD1 has a performance for her hobby soon. We've been told 3 people can go to watch. On the day of the performance DM is coming up to visit, this was planned before we knew the date of the performance but works out well as she likes the same hobby and will be interested to see it, so makes sense for her to come along with DH and I. Yesterday PILs were over and DD mentioned the performance, MIL said "great, let me know what time it is", I explained DM would be coming as she's visiting that day, MIL nodded, conversation moved on. Then last night FIL called DH saying I'd really upset MIL by "excluding" her. I don't see it that way, there's no reason MIL would go ahead of anyone else and she's never shown an interest in DD's hobby before, plus DM rarely comes up so hasn't ever gone to any of the DC's shows/school plays/etc whereas MIL has been to a couple. AIBU? MIL is coming over later and I don't know what to say.