I'VE ACTUALLY GOT THIS! Falling Petals absolutely
is a 'married life' romance.
I mean, it's a 'married unlife', and they've only been together for like 20 years in a world where women can't just up and marry other women, so they're not technically married... BUT IT IS
EFFECTIVELY MARRIAGE ROMANCE! :D
It's even TESTED marriage romance! :D It isn't even smut! It's mature rated though.
They've even got a child... who is a teenager. It's my signature, fam :)
Edit: I'm just excited that I can actually recommend my own thing. Too many recommendation threads have come by (on RRL) lately that have been like, 'every single amazing thing about my story, I've totally got them'.... and then it's like 'but no OP MC', or 'I want my kingdom building to have *progression in strength*', so I'm just super stoked that this one applies to the incredibly vague terms of the OP! :D