Looking for a Historical Alpha-Omega M/M Novel

[3ruri]

I need help if anyone has ever encountered this book. For some reason I can't remember the names of the characters, title or author, but below are the details:

Setting: Historical (sometime in Victorian Era maybe)

Story: The omega is a prostitute at a red light district. He got pregnant and went to seek the alpha father for child support. Unfortunately, the alpha had died, but he has an older brother, who is also an alpha and a very distinguished nobleman. Lord Alpha agrees to help the omega since it was his brother's kid. For some reason the omega ran away and was captured, but Lord Alpha came to his rescue. They live happily ever after.

I have been checking my archive for this book but couldn't locate it. Hope someone here can help me.

Thanks!