A Wallflower Demands Satisfaction by Andrea K. Stein

Olivia Jones needs justice more than she needs a husband
Olivia Jones is the acknowledged best laundress in London. She’s spent years perfecting her methods of producing the softest, lavender-infused linens. Some of the wealthiest lords in England send their soiled shirts to her and don’t count the cost.

She’s become comfortably well off managing the exclusive laundry for Goodrum’s House of Pleasure, owned by Captain Eleanor Whitcombe, Duchess of Chelmsford, and her side business of custom laundry for the tonnish families in Mayfair.

Although Olivia does not need, or want a husband, her adoptive brother has wangled a Season for her and a large dowry, both sponsored by the duke and duchess, in exchange for an, um special favor he provided Her Grace several years earlier.

A notorious blackmailer picks on the wrong woman
At her first formal ball, Baron Barclay Reynolds approaches her and demands she accept his offer of marriage. If she doesn’t, he’ll turn over what he knows about her real mother, a well-known opera singer to the gossip sheets. The blackmailer has underestimated the rage simmering beneath the surface of the sweet young laundress. She determines to destroy the disgusting baron on her own terms.