Punished Bride. Keyhole Romance

Christina doesn't understand why her new husband spends so little time with her by day and, at night, she feels as if there should be more to their intimacy beyond basic coupling. Meanwhile, she's lonely on the estate and desperate for news from the outside world, so she allows Percy to visit when her husband is out of town. Until one day, when Percy goes too far. Tipped off by a servant, Damon-Lord Pembroke-comes home to find his wife in the arms of another man.
Damon is livid and, after he takes care of Percy, decides he must teach his young wife a lesson about entertaining men in his absence. Since they married, he's been torn between what he wants to do with her and what he promised her pious parents he wouldn't do so they'd allow him them to marry. But Christina seems to have disregarded her vows to him, so he has abandoned his vow to her parents. Now, his bride needs to be punished and anything goes. (Keyhole Romances are historical erotic romances by Lyla Sinclair)