Anyone know this manga?

Main character is kinda a maid, house keeper, accountant, all in all, and she works for some duke, count or prince. She works there for a really long time, I think the duke might’ve been cold/unfruitful to her but really warmed,up to her over the years. And then she decided that she wants to leave to get married and have kids, but the duke gets really pissy and doesn’t let her because he doesn’t want her to get married because he’s fond of her