I can see this going 1 of 3 ways:
1.) the baby dies, and they all get sad and hit and possibly the mother/father regress to their suicidal ways
2.) the Mother Dies but the baby is fine, the father then gets all Depressed (maybe clannad After story style)
3.) they both die, Sad times, cryfest then they reflect on what they did wrong and try to improve the process with what little they have