Know the difference between being a Mother and a Baby Momma!!
This is pretty much self-explanatory -- there is a difference between being a Mother and being a bitter, spiteful Baby Momma. Relationships don't always survive the storm. In the event that they don't, raise the child or children in a amicable manner. Don't employ control tactics to force anyone to remain in the relationship and don't use the child or children as pawns in your Revenge of the Bitch strategy.