I'm not sure about a specific 'Lucius and Hermione Veela pregnant' fanfiction. However, you can try searching on popular fanfiction websites like FanFiction.net or Archive of Our Own. They have a vast collection of fanfictions and you might be able to find something related there.
Often, there could be themes related to acceptance. Lucius may need to accept Hermione in a new light, and she may have to come to terms with the Veela side of things during the pregnancy. Also, there might be a theme of facing the judgment of the wizarding world. Their relationship is not a typical one, and with a pregnancy involved, they would likely face a lot of scrutiny from others.
Well, in such a fanfiction, it could start with an unexpected encounter between Harry and Lucius in a situation related to the Veela. Maybe the Veela has some special powers or a role in the wizarding world that draws Harry and Lucius into her orbit. The pregnancy aspect might then introduce a whole new set of storylines, like how the wizarding community reacts, or how they deal with the implications of a half - Veela child. It could also explore the changing relationships between Harry and Lucius as they are both involved with the Veela and the impending birth.
The main characters are clearly Harry, Lucius, and the Veela. Harry is a well - known character from the Harry Potter series. Lucius is also from the same series, often portrayed as a somewhat villainous character. And the Veela is a magical creature in the Potterverse, known for its beauty and allure, and in this fanfiction, she is pregnant, which makes her a central figure in the story as well.
Hermione could also use her magic skills to her advantage. She is a powerful witch, and in the Malfoy household, she may use her magic to create a space for herself where she can be true to herself. She might also use magic to subtly influence Lucius and make him more accepting of her and her beliefs.
One interesting plotline could be the clash of their different ideologies. Hermione, with her strong beliefs in equality and justice, and Lucius, from a traditional pure - blood family with elitist views. Their marriage, forced by the law, might lead to a power struggle within the Malfoy household as Hermione tries to assert her values.
Lucius has a sense of entitlement that comes from his pure - blood upbringing and family wealth. Hermione, being a Muggle - born (in the original story), has had to fight for her place in the wizarding world. So in fanfiction as siblings, Lucius might initially look down on Hermione's more inclusive views, while Hermione would be appalled by Lucius's prejudice. However, as the story progresses, they could learn from each other. Lucius could become more open - minded and Hermione could understand the pressures of a pure - blood family.
Hermione's Veela heritage could make her more alluring and confident. In the presence of Snape, this might initially annoy him as he is used to seeing Hermione as just a studious Gryffindor. However, as time goes on, her Veela charm could start to break down his cold exterior. For example, in some fanfictions, Hermione's Veela side might cause her to be more assertive with Snape, challenging his views in a way that he can't ignore.
Another idea is that Hermione is there by accident. She could have been exploring the Malfoy Manor (where Lucius's office is located) out of curiosity or in search of something related to Harry Potter's past. Once in the office, she discovers a hidden secret about the Malfoy family that could change the course of the wizarding war.
Fanfiction about Hermione and Lucius can be quite interesting. Writers might play with the concept of redemption for Lucius. Maybe Hermione sees a side of him that others don't. It could also be a way to explore power dynamics in a new context, with Hermione's intelligence and Lucius's former status in the wizarding world.