Hey man, I remember your post about the miscarriages and the emotional cheating with her
texting someone else. First things first, you need to decide if you still want to be with her and have children with her. If you do, then you'll likely need to start the relationship from zero-without grudges and resentments—because once you have a child, those unresolved issues will resurface in ways that can poison the family dynamic. Carrying past resentment into parenthood only makes co-parenting harder and creates an unstable environment for the child. A clean slate means better communication, mutual respect, and the ability to truly work as a team, which is essential when raising a child. Think of it like quitting drinking-if you want a fresh start, you have to cut out what's toxic and commit fully.
Alternatively, if she can't have children or if you'd rather find a new partner to start a family with, 40 isn't too old. Technology has advanced—IVF, IUl, and even medications to boost sperm count and motility-so it's still very possible to have a child in the next few years.
Lastly, if you do have a child and you're not wealthy, leaving the relationship later could get complicated. At your age, she'll likely push to keep the family unit intact. She'll involve both of your families, guilt-trip you about how much your child misses you, and use emotional manipulation before even considering taking you to court. It will get messy, and that's why starting from zero now-if you choose to stay—is the best way to protect yourself from that future chaos. As soon as you have a child with her she will be in the picture forever.