Her Night with the Duke by Diana Quincy

Desire knows no reason…
When Lady Delilah Chambers finds herself stranded at a country inn on a rain-swept evening, she’s forced to fend off a group of ruffians with the help of a handsome gentleman. Irresistibly drawn to each other, Leela and the stranger spend one reckless night in each others’ arms—and then go their separate ways. But the very next day Leela receives the shock of her life when she meets the duke who is set on wedding her beloved stepdaughter.

When it finds two destined hearts…
One night isn’t enough with a woman as fierce, fiery, and brilliant as Leela. Elliot Townsend, Duke of Huntington, cannot believe his good fortune when their chance encounter leads to an unforgettable evening of passion. Yet Hunt’s luck runs out when he is introduced to his prospective mother-in-law. Dowagers aren’t supposed to look like this…

Leela and Hunt are determined to keep each other at arm’s length, which should be easy enough for two intelligent adults with reputations to uphold. The problem is all logic is lost when it comes to a passion that refuses to be ignored.