MissWallace's definitions
Two baby mamas who share the same baby daddy. The baby mamas are friends and have good relationships with all their children and each other's families, without the baby daddy.
My baby daddy gets jealous that his two ex's get along and have become Sister Mamas, who act like positive loving adults for the sake of their children.
by MissWallace March 6, 2014
Get the Sister Mamamug.