Leo, Duke of Chandos, can't quite believe it. After many mistresses, and much mischief and merriment, he's fallen head-over-heels for his best friend's sister, Lady Theo Vivers. Now that she's come out, Leo is ready to give up his wild bachelorhood for wedded bliss. Yet despite his attentions, Theo regards him at best as a friend—at worst, as a brother. Determined to persuade her otherwise, he perseveres through the Season's most grueling social events . . .

Theo is quite aware that Leo is irresistibly handsome, charming . . . and decidedly unsuitable husband material. She also happens to know of his vow not to marry until he is much older. So, when a compromising folly leads him to announce they are betrothed, Theo dismisses it as the kind act of a friend—and assures him she will liberate them from the situation. Until then, she must play along—while hoping to interest two far more appropriate matches.

But between misunderstandings, romantic rivals, and a risky move that will put more than Leo's reputation on the line, the time they spend together as an engaged couple begins showing Theo just how devoted—and tempting—this allegedly reformed rogue can be . . .