The Skeptical Heart in Bloomington, MN

Widowed young, Augustine turns aside unhappiness by playing matchmaker, a skill she excels at among the ton.
Joseph, Lord Sumner, already has a history with Augustine, a neighbor and former friend; his own disastrous marriage had been her one miserable failure in the field of matrimonial pairings.
But his young son, Marcus, is in dire need of a parent always at hand where he can't be, so Joseph turns to Augustine for quick assistance in finding a new wife.
How to say no to the one person Augustine has failed? Except, when Joseph lists what he wishes for in a new wife, he chooses exactly the opposite attributes Augustine believes he requires.
Forget his wishes, she must tend to his needs. She'll find darling Marcus the kind-hearted mother he deserves, and dear Joseph a loving bride to mend his broken heart.
But such a paragon proves elusive. Augustine begins to despair no lady will live up to her requirements. She needs to find a lady rather like...well, herself.
Now, how to convince Joseph's skeptical heart?