Funny plot hook, can't believe they took it, help me flesh it out

[Brother Oni]

I also see this character as thinking "ok, I'll give the human 20/30 years, and then I can go back to my loved one with no one objecting".

Alternately she could arrange for her husband to have an accident and she takes over the city as regent until her son becomes of age.

Would be interesting for the party to hear news of how their matchmaking went a year later, via travelling merchant gossip or they're passing through the region at some point in the future.