In reality, Malacai didn't have anything like this in mind. He never took any woman because of desire or feeling. The only exception was Nerissa.
Mara was born because of her sacrifice and her becoming his first Apostle. His meeting with Caeli was because of her mother, and then he saw the opportunity to make her his Apostle.
Reina and Emma were because of their usefulness, while Aurelia was the one making a move on him.
Malacai wanted to answer no, but he knew Caeli did this for their benefit. "Only if you want it, and what I really wanted is for you to fulfill that requirement."
'My dear… that is not how you do it,' Caeli said in an annoyed tone in Malacai's mind.
"Why is this very important to you? Is this related to your power?" Aine asked.
She only knew about providence power itself, as her question before was more on how Malacai's power worked and its origin.