Aliens settling on Earth in some big towers to search for their mate. They devote their entire life to them.

[Bleu]

Alien romance erotic happens on earth. Each book title is the name of the main character in the book

The alien settle on earth to find their fated mate.
The first book is about one of this alien who look like human : they are quite beautiful. Human governments are trying to have their DNA in every possible way. They can feel human emotions.
They can only have one baby and one fated mate. To keep the baby alive in the mother stomach they have to give her their seed : sot hey have to have sex every day.
I read this book between 2016-2019

Thank you very much in advance !