One of my MOH's is flying up to visit and we're going dress shopping. When she asked if it was a good time for a visit and do some wedding planning, I said "Great, I'll see if other MOH is around and grab Mom, FMIL, and FSIL, and we'll look at dresses."
When we're going over logistics and carpooling to appointments, she tells me her sister is super excited and is coming, but may only be able to make it to one appointment so they will meet us there and she'll jump in the car with me afterwards. I'm pretty annoyed (trying not to get all-out pissed off) because I never invited her sister along, and I've wanted to keep this small and private. I'm bringing my mom, FMIL, FSIL (who's also a bridesmaid) and this MOH to this round of appointments, and I've had to tell several really close friends "Sorry, I"m keeping dress shopping appointments to our moms and bridal party."
I never had any intention of asking her sister to join us; we get along but we're not friends, and I only see her when MOH is around because she usually stays with one of us when she visits.
Am I overreacting here? I feel like she could have at least asked if her sister could tag along instead of telling me she's coming.