Himitsu No Himegimi Uwasa No Ouji
Nobara no Hanayome
I Found a Husband When I Picked Up the Male Lead
CH 6 CH 15 The translation went down in quality, but either way the story doesn't seem that great. Already so many cliches, and I really don't like the FL. Pacing is also pretty terrible. So far, the kid is cute but that's it. Rather that the duke, she's the one who's petty and rude. He has every right to be suspicious of her especially since everyone seems to know about her original wasteful personality when it comes to money. He has no obligation to be friendly with her, and that's what makes her mad. But he's suspicious of her so of course he's not going to be nice to her! Anymore than he was to previous scammers. Readers just expect him to because she's the FL, but it's not like HE knows that. (Ch21)
Hananoi-kun to Koi no Yamai