Earl's Inconvenient Wife by Julia Justiss

The obvious solution: a marriage of convenience!

Temperance Lattimar is too scandalous for a Season, until finally she's sponsored by Lady Sayleford. The whole charade feels wrong when she doesn't want a husband, but Temper feels awful when MP and aristocrat Gifford Newell is appointed to 'protect' her at society events. With her past, she knows she's not an ideal wife...but then a marriage of convenience to the earl becomes the only option!