In some fanfiction concepts, it could be due to a deal made by Dumbledore. To protect Hermione from a greater threat, he makes a deal with Lucius that Hermione will be in Lucius' care, which Lucius interprets as making her his pet. This would put Hermione in a very difficult situation where she has to navigate the power dynamics between Dumbledore and Lucius while trying to regain her freedom.
One way could be through a dark magic spell gone wrong. Maybe Lucius was trying to create a servant using a forbidden spell and it backfired, turning Hermione into his pet in a way that she retained her intelligence but was bound to him. This would create a very complex and tense relationship within the fanfiction world.
It might start with Hermione being captured by Lucius. He could see her as an interesting specimen, perhaps because of her intelligence and magical abilities. Instead of killing or simply imprisoning her, he decides to keep her as a pet, using magic to control her actions. This would lead to a lot of internal struggle for Hermione as she tries to break free from his control.
Their relationship could start with hostility. Lucius might initially try to undermine Hermione's efforts in some wizarding matter, but she outsmarts him every time. This could gradually turn into a begrudging respect as he realizes her intelligence. For example, in a magical research competition.
Realistically, it could be a slow - burn relationship. They might start as adversaries, with Lucius still holding some of his old - fashioned views. But through a series of events, like Hermione saving Lucius' life or vice versa. This would make Lucius re - evaluate his views. They would then begin to communicate more, share their stories, and find common ground. Their relationship would grow over time, and when they decide to have a baby, it would be a natural progression of their new - found love.
Perhaps there could be a parallel universe scenario. In this alternate reality, Hermione's role as Lucius' mother could be due to different historical events. It might start with a divergence in the wizarding wars, which results in different pairings and family formations. This could lead to a very different Hogwarts, where Hermione's influence on Lucius shapes his actions towards Muggle - borns and the overall wizarding society in a new light.
In such fanfiction, Hermione could develop her understanding of the dark side of the wizarding world more deeply. Through her interactions with Lucius, she gets to see the inner workings of the dark wizards. This might make her more empathetic towards those who have been corrupted by the dark side, while also strengthening her resolve to fight against it. Her relationships with other characters could also change. She might become more isolated from her friends at first, but then find new allies among unexpected characters.
In some fanfictions, this could be possible through alternate universe scenarios. Maybe a spell gone wrong alters everyone's memories and relationships, leading to Hermione and Lucius getting married. Another way could be a political alliance in a world where the war has changed the power dynamics drastically, forcing strange bedfellows to come together.
At first, Lucius might be shocked by Hermione's flirting. He's used to a certain type of pure - blooded behavior, and Hermione, as a Muggle - born, is completely different. But as she continues to flirt, he could become intrigued. He might start to see her in a new light, not just as a Mudblood but as an intelligent and alluring witch.
In fanfiction, the relationship between Hermione and Lucius can be quite complex. Some fanfictions might explore a scenario where they are enemies forced to work together due to certain circumstances in the wizarding world. For example, they could be paired in a mission to save Hogwarts from a new dark threat. Their different backgrounds, Hermione being a Muggle - born Gryffindor and Lucius a pure - blood Slytherin, would create a lot of tension and interesting character dynamics.
In the fanfiction world, the author might have created a scenario where the wizarding world is facing a new and greater threat. Lucius and Draco, having insider knowledge or resources, approach Hermione to form an alliance. At first, Hermione is skeptical but as they work together and prove their reliability in dealing with this threat, she begins to trust them. This could involve them sharing important magical knowledge or artifacts with her that are crucial in fighting the new danger.
Their relationship might start with a lot of hostility. Hermione, with her strong sense of justice, would be very wary of Lucius, who has a history of being on the wrong side. But as they interact more, Lucius could be intrigued by Hermione's intelligence and courage. He might start to change his ways to impress her, and Hermione could see the potential for good in him.
Their relationship would likely become more complex. At first, there might be a lot of denial and resistance, especially from Hermione who has always seen Lucius as an enemy. But as the pregnancy progresses, they would have to find a way to co - exist. Lucius might become more protective, while Hermione would be more assertive about her own and the baby's needs.