The Duke Risks it All by Emily E K Murdoch

Peregrine, Duke of Markham, is not a man to trust.
And that’s exactly what my friends have done. The other three members of the Gambling Dukes, they trusted me—and now I’m thrown out, lost, alone, and desperate.

So what do I do? Avoid the gossip sheets, hide from Society?
No. I’ve found a beautiful heiress, certain that I can trick her into marriage and save myself from financial ruin.
Precisely why I allowed Lady Briar Weatherford to get under my skin—and under my clothes—I couldn’t say…
When a duke risks it all, only one person can win: and it’s got to be me. If I risk everything and lose, I’ll lose myself to Lady Briar Weatherford…