Several thoughts here SS: 1. She might have Post Partum Depression. This is a real thing. Tell her to go see her PCP or Gyn for Meds. 2. New baby. You're working enormous hours. Enormous. So the last thing you can adapt to is a woman who is also exhausted mentally and physically from baby. Kids are like sponges, they suck you dry and then leave you. 3. She may be all touched out from constant feeding and touching with baby. Sex is tough the first 8 months for a new mom, some more than others. So, she may feel 4. Terrified you will leave her high and dry with the new baby. And feel unattractive. And see how you have pulled away from her. So she attacks you pushing you further away,,,etc. she sees yu won't marry her, so she attacks you more. It's a vicious cycle, Let me suggest the two of you seek marriage counseling. You love your baby, right? More than life itself, right? Then you must do everything you can to see if this can work. Because a child who is raised by two married parents has a huge leg up in life. Trust me on this one. If the counseling goes nowhere, then you know you tried your best. Ask several doc's who they refer to for marriage counseling. Whoevers name keeps popping up, go there. Once a child is born, it's never about you anymore. Nor about her. You want to raise a tulip, not a weed. It takes a lot to do that.