Another thing I notice is that Vampires probably have met many different women throughout the process, yet they seem to fall for the female lead so easily? There seems to be little reasoning behind why they are so obsessed with the female lead out of everyone else in the world. As a cold hearted vampire who looks down on humans, it should be especially hard for them to open their hearts.

Children of Sin

Link: https://www.webnovel.com/book/children-of-sin_18904731106667205
Synopsis: The mysterious Zephyr family consists of an absent father and two sons, and Liliana is forced into joining their family. There's nothing particularly special about Liliana. She comes from a humble lineage and had grown up in a small town her whole life. The Zephyr family shouldn't know of her existence. So why was she chosen to be their sister?

Liliana finds herself thrusted into the mysterious world of her two brothers, and slowly begins to understand that the family is far darker than she expected, and the reason to why she is in the center of all of it.