A Virtue of Marriage — Elizabeth Ann West

Book 2 of The Moralities of Marriage, continuation of the saga from By Consequence of Marriage.With Fitzwilliam Darcy hopelessly tangled in his family's lies and deceit in Kent, reinforcements are on the way in the form of his cousin, Colonel Richard Fitzwilliam, and his secret fiancee, Elizabeth Bennet. Two generations of the Fitzwilliam family clash at Rosings and the matrimonial futures of both Darcy and Richard hang in the balance. When Lady Catherine goes on a rampage, and the Bennets become swayed by the vicious gossip swirling the Darcy family, both Elizabeth and Fitzwilliam learn you inherit each other's family drama by virtue of marriage. 
A full-length novel, A Virtue of Marriage continues the six-part Moralities of Marriage series.