@FamilyOfAliens
And you can’t “get out of” being a parent in the same way that you can get out of a marriage. I’m really surprised you see it that way.
The OP doesn’t want to get out of parenting.
Parenting and running a house / household are different things. She has her own property and earns her own income.
Look at the number of women on MN who are in abusive relationships but stay because they have nowhere to go, no assets, no independent financial security.
In terms of financial independence and housing, not being married means the OP can disentangle a household quickly and know that she is secure.
I do think, OP, that there would be complications and admin around access and maintenance payments, same as if you were divorcing.
I get really exasperated with MNers insisting that marriage ALWAYS benefits women. It doesn’t.
I didn’t marry, we co-parented equally, both kept our careers going, both made the (willing) sacrifices of working 4 days a week each in the ore-school years, took equal responsibility for sick days etc. You can look at the stats and say “how do we do things differently”.
I always earned a bit more, I had bought a flat as soon as I could and built up My equity and my pension as a conscious protection against the challenges that women face. So now I get my equity back, and hang on to all my pension. I would be much worse off now, had we married.
We aren’t stupid. We had wills. POA. Insurance. You need those things if married anyway.
So. Yes, marry if one of you will be a SAHP or compromise financial independence through parenting, but each case needs to be looked at on its merits.