Sir Philip's folly - M. C. Beaton

Commotion reigns at the Poor Relation hotel when two unwelcome ladies create chaos among the established order of things!

Sir Philip Sommerville is quite the antique, but not too old to bring home a paramour: fat, vulgar and greedy Mrs Budge who, the other poor relations are agreed upon, has to go.

And then there is Lady Carruthers, a highly rouged widow who passes off her grown daughter, Arabella, as a school miss while setting her own cap for the young Earl of Denby, despite the fact that young Arabella is quite smitten with the dashing golden-haired earl!
So once again it is up to the other poor relations to straighten out the course of true love...