Onee Nurse is a little lewd.
Also, Nurse Rei <3
She has been happily married for 16 years and somehow is so bad at romance? That's genuinely interesting
I think the implication is she married her childhood friend immediately post highschool
(CHILDHOOD FRIEND ENJOYERS RISE UP) so she never had to be good at romance. She never had to deal or wonder if they like me, she was just with her childhood friend-now-husband and they just ended up together without any traditional romance.
No build up or nervousness just
"I'm moving to Tokyo after graduating. Want to get married?"
"Okay."
So she has no idea how to give romantic advice because she was really only in a relationship with one man in her entire life, and it just sort of evolved to marriage without anyone (or least without HER) having to do anything but let it happen.
Alternatively...
Her youth is shown mosaiced.
If we read into her last tip about "just sleep with her once, everything will work out" makes me suspect that Haruka was a bit
frisky in highschool and its probably a good idea she has medical training to keep her husband from expiring after she's done wringing him dry.
It sounds like she and her childhood friend banged and that made them realize they weren't just friends any longer.
We're getting the stealth epilogue of Chikasugiru Futari dropped on us.
You know damn well each and every single one of us is still going to be here even 200 chapters later still waiting on that confession and still complaining.
Honestly I don't care all the much. By Romcom standards they haven't been taking that long. There is gradual but consistent progress, no weird backtracking, Mao-chan chapters are great, and we all know this manga is timeskip to the end once he confesses so I'm down for another 100 chapters of what we've got.
Though that's a catch 22, since as close to the confession as we are they can't give us 100 chapters and still have the gradual but constant progression and character growth we've had so far.