Am I over reacting(?) I feel so upset that our party invitation given to one of my child's preschool friends - who's mother see's me almost daily as she works at the preschool (and knows who I am) hasn't bothered to respond. I then find out from my child's key worker after numerous requests to chase up RSVP (who is actually said mother's best friend) that yes, the child will come along, but another parent will be bringing him.. Is this extremely rude or is this acceptable behaviour?? :-(