Two women who will pact for life. They will hunt down unsuspecting Sports Figures or Actors and such and initiate a three way. As the man is ready to ejaculate, one lucky lady will savor thus ejaculate in her mouth and when the man is not looking, quickly spit it into her “sperm sisters” vagina in hopes to have his baby! The unsuspecting sucker never knows how it happened but nevertheless is just another victim of the sperm sisters.

when you're hungover as shit after a spending a night drunk as a skunk

Women who all have a child with the same mans sperm and support each other for the sake of the children.