Books with: Regency-era Historical Romance with a widow and a lord

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Basically just the title. Preferably, the widow has a kid/step-kid who appears periodically, but not if it's a story where the lord is supposed to be courting the widow's step-daughter or anything like that.
I've read a few that I really liked recently, like If He's Tempted and What a Wicked Earl Wants, so I'm looking for more.