The Elusive Wife by Callie Hutton
Jason Cavendish, the Earl of Coventry, needs to discreetly locate his unwanted and abandoned bride among London society to request an annulment. Too bad he can't remember what she looks like because he was blind drunk at his arranged wedding and hasn't seen her since. And there's the lovely Lady Olivia that he can't seem to get off his mind...
Newly arrived from the country for the Season, Lady Olivia is appalled to discover that her own husband, Lord Coventry, doesn't even recognize her. She's not about to tell the arrogant arse she's his wife. Instead, she flirts with him by night and has her modiste send her mounting bills to him by day.
Hell hath no fury like a woman scorned... too bad this woman finds her husband nearly irresistible.