If that were my situation and a child was on the way, I would do whatever it takes to attempt to provide a happy, loving and HEALTHY home for my soon to be offspring. I would help the mother of my child to become or gain whatever things she may need to be a good and adequate parent to my future child. I would even get both of us into Parenting Classes or anything I could find to make sure our child gets the very best parenting possible because my child will be the most IMPORTANT thing in the world for now. I would leave no stone unturned to look for solutions to whatever problems my wife and I are facing FOR THE SAKE OF OUR CHILD!
But that's just me.
good luck,
jim