I guess I wasnt clear - is your daughter bothered? Or just theirs? because it comes across to me as TOTALLY a THEM problem. HER daughter wants to socialize and yours isnt available.... which simply isnt your problem regardless of anything else.
I still think you are 100% 'in the right'. So to speak. You didnt ask her for advice and I would ignore her completely. If you are wondering if there is a grain of truth there, ask your daughter. IF she feels deprived in any way, maybe find some way to work something in. Although personally, I'd steer her towards a friend with a less obnoxious parent!
dd1 10/05
dd2 11/09
and ... a mini poodle!