Conceive, My Lady

The day before the formal meeting for her engagement to the Grand Duke, Rosaline Eileh takes the place of her runaway sister, Anesa. She must go through with the marriage without being exposed. But...

"You haven't changed a bit, My Lady."

"Still looking much too frail to bear children."

Carlyle Languester speaks as if he truly knows Rosaline.
Misunderstanding that she fled before the wedding, he moves to trap her.

"Prove it to me, My Lady."

"What must I do to set the Duke's mind at ease?"

"Undress."

Original Webtoon