Three sets of sisters are helping the West Allis Blue Jays softball team build chemistry and a winning streak.The Blue Jays have won six straight conference games, and head coach Dean Mlachnik says the family connections on the roster are part of what makes this group special."It's rare. First of all, you have to be talented enough to be up at the varsity level. Being a sophomore, all three of the sophomores are really good. The three seniors ar…