My 8 year old daughter's current best friend has been "banned" from my house.  All I know is my side of the situation:  kids over to play and other friends came over to play too.  I let them go to another child's house to play and also my daughter decided herself to go over to the neighbor's house and see if she could play too.  When friend was picked up her socks were muddy and sister was upset (they were her socks).  No explanation from the other Mom, but I was told that my daughter's friend told her she's not allowed at our home anymore.  What to do?