anyone know how to deal with one of "those" moms? My son is in preschool and it always seems that whenever we are bringing our kids to school or picking them up she seems to ignore me.. I will be sitting right there and smiling and she turns the other way. Then when the other parents come in she says hey how are you.. etc.. I say hi to the other parents as well and am friendly but its just seems to be really weird tension when we are both within a few feet of each other. I spoke to her one time but then she never bothers to speak to me anymore.