My uncle my master

This is a master x slave pairing and is uncle x niece. They are vampires

Niece

She is given to him as a gift from his boss. As a thank you gift for his hard work. (He can work in any industry you feel like) She was sold into the trade by her father after he left MC's mother having taken her from his uncle who was supposed to marry her. Mc is still a virgin, rare amongst slaves. When he gets there and sees her. All the love he had for her goes away. Because they are pure blood and they have high pride in being nearly unbeatable. So upon seeing her again he feels that she is pathetic and weak. In other words unworthy of love, affection and to be treated worse than the lowest servant of their house. He uses her for his pleasure and entertainment. Thinking that he Can not have kids. (He could have had an accident or something else) He feels no need to use protection with her. This leads to her getting pregnant since she is not allowed birth control. And once he finds out his view changes. Because she is having his baby. A miracle. Can love be found? Can the relationship be fixed? 

Required are: Pregnancy, Punishments, Domination, Collars and leashes

Please read my entire plot. The image attached to the post is MC.