Never been in your situation but you saying it: God has a plan for your family and never doubt about it, even in financial needs a babies is always good he will be your rock and your more blessing because a sister already loves him and is Wating for him, we had our baby and a very bad economical situation and I breastfeed so no worries to buy bottles and milk, and I was buying clothes as need it, the expensive thing are diapers and wipes but I think is help out there if you struggle on that too....well even that we where not even close to afford a newborn we did and turns out great ! My husband is getting lots of work and we are more blessing everyday .
About the father of your child's well probably the hormones are getting into him too !! And if not and he wants to move over well ...you don't need someone been held against his will don't you think? And what he's saying about been with her daughter not with the new one sounds silly to me kind of child thinking ....you will see... everything will get better or for good....you have a miracle on you !! Love it and enjoy it..