He Chose a Vampire Heir，I Stepped Into the Sun

When Alaric inherits House Ashford and its full authority, he also inherits Vivienne, his late brother's widow. Because his wife Maren is human, Vivienne can give him what Maren cannot: a pureblood heir. He promises he only needs one child from her, and Maren believes him — until his visits to the east wing grow longer and his visits to her grow rare.

The day Vivienne announces her pregnancy, Alaric takes the three-hundred-year-old Ashford Crest from Maren's neck and clasps it around Vivienne's. Elaine declares the heir belongs to Vivienne now, and Maren, a general's daughter, is told she should be grateful. Maren says nothing, sets down the estate ledger she has always kept, and walks away.

That night Alaric comes to her, promising he is hers alone, but the tuberose on his skin is fresh. When a cry from the east wing sends him running, he shoves Maren aside without looking back, and she is left on the floor of a room that still smells of another woman.