The Good Fortune of Miss Robbins by Melanie Dickerson

My only remaining marriage prospects were the head gardener, the vicar, and the steward. But how could I marry any of them when I was in love . . . with Lord Brookhaven?

Charlotte Robbins accepts a governess position for the Earl of Brookhaven’s siblings despite rumors of the earl’s severe and mysterious demeanor. As a lowly governess, Charlotte entertains thoughts of possible romance with an eligible servant until she does fall unexpectedly in love–with the pensive earl himself.
But love does not mean a match is possible, and the earl’s friends warn Charlotte that if he were to fall for her, it would ruin him. Just as Charlotte resigns herself to the impossibility of her feelings, she receives news that she has inherited a fortune from a long-lost relative. Now thrust into London high society, Charlotte grapples with suitors vying for her attention, but her heart still belongs to the Earl of Brookhaven. As secrets unfold, she’s no longer certain if her newfound fortune is a blessing–or if it is the very thing that threatens the love she’s always longed for.