One Last Smile by Blake Pierce

In the lush, rolling hills of the Cotswolds, governess Mary Wilcox finds her latest charge: the Carlton family. With wealth and elegance that could rival royalty, the Carltons are the epitome of modern aristocracy.

But beneath their polished exterior lies a tangle of silent grudges and family secrets.
And one of them may lead to murder.
Someone in this household harbors a sinister story, cloaked in aristocratic civility—a story that could turn her into the confidant of a troubled soul–or the next unsuspecting victim.
As Mary digs deeper, she encounters inexplicable occurrences that mirror her own sister’s disappearance, causing her to question if she’s uncovering truths–or falling prey to her own haunted psyche.

In a house full of masters and secrets, who can she truly trust?