Lady No Says Yes by Jess Michaels

Stunning heiress Sophie is known in Society as Lady No because she’s spent the past few years refusing the advances of every suitor. But when her beloved aunt challenges her to say yes for just one Season, she can’t refuse.
Rowan Sinclair has just had his inheritance stripped and is in dire straights. When he discovers Sophie’s secret reason for suddenly saying yes, he knows he can use it to his advantage, even if he doesn’t feel good about it.
Their unexpected connection quickly turns passionate and grows into something deeper than either ever could have expected. But can Sophie overcome her reasons for saying no in the first place? And when she finds out the truth about his courtship, will she ever forgive him?