Mama for mama friend! Mama who goes to the same little garden and the child of the child of the adult who is going to the kindergarten

The circle of parents who went to the same kindergarten, was called "Mama friend's yurissa" commonly used! Mama friend group invites the friend's father of the child and gather the person, and it gets from the daytime! Although the middle ages are prohibited in the circle rule, the delinquent calls off the rule and asks for the middle out, and it is glad to receive the sperm other than father and son's father.