Tonks would likely be extremely heartbroken. She loves Remus deeply and having him leave while she's pregnant would be a huge shock. She might first go through a period of denial, not believing that he's really gone. Then she would probably be angry, feeling betrayed by the man she loves.
Tonks would be a mix of sad and determined. She's a strong - willed witch. So, while she would be devastated by Remus leaving, she would also be determined to take care of herself and the unborn baby. She might reach out to her family and friends for support, but also start planning how to find Remus and make him face his responsibilities. She could use her skills as an Auror to track him down, all while dealing with the emotional turmoil of being pregnant and abandoned.
Maybe Remus leaves because he feels unworthy. He has always seen himself as a danger and an outcast. Despite Tonks's love, he can't shake off his self - loathing. So, in the fanfiction, he leaves while Tonks is pregnant, leaving her heartbroken. However, their friends, like the members of the Order of the Phoenix, might try to convince Remus to come back and be a family with Tonks.
Well, at first, it might be a bit of a shock for both of them and put some strain on their relationship. But as they come to terms with the pregnancy, their bond would strengthen. Remus would start to see himself in a new light, as a father - to - be. Tonks would be excited about the new life they are bringing into the world. They would have to work together more closely, sharing household chores, preparing for the baby's arrival. Their relationship would evolve from a somewhat uncertain love affair to a more stable, family - oriented partnership.
Maybe it's because Hermione represents a new beginning for Lupin. She has a different energy compared to Tonks. Lupin could be drawn to Hermione's thirst for knowledge and her ability to look at things from a unique perspective. In fanfiction, the author can create all sorts of reasons, and this could be one of them.
She might also be sad and heartbroken. Ginny is a strong character, but being left alone while pregnant is a huge blow. She could withdraw from her friends and family for a while as she tries to come to terms with the situation and figure out how to raise the child on her own.
Fanfiction.net is a great place to start. It has a large collection of fanfictions about various characters, including Remus and Tonks. You can search by the characters' names or by tags related to their relationship or the Harry Potter universe in general.
One possible scenario in this fanfiction could be that Teddy shows some unique magical abilities that remind Remus and Tonks of their own magical heritages. Maybe Teddy can transform in a way that combines both werewolf and metamorphmagus traits, which would be a really interesting plot point. It could also explore how Remus and Tonks, who had such a tragic end in the original story, get to experience some happy moments with their son Teddy through the magic of fanfiction.
One idea could be to focus on how they prepare for the baby's arrival. Maybe Remus is worried about his werewolf condition affecting the child, and Tonks has to constantly reassure him. They could start decorating the nursery with magical elements.
She could be heartbroken. Tonks is a passionate character. She may initially be in denial, not wanting to believe that Lupin would leave her. She might try to talk to him, convince him that they can overcome any difficulties together.
Love against all odds is a very common theme. Given Remus' condition as a werewolf, they face a lot of opposition and prejudice. Fanfictions often explore how their love overcomes these difficulties.
Severus could be initially shocked and confused. He might feel a sense of loss and regret, especially if he had some feelings for Serena. He could then start to search for her, trying to understand why she left and if there's anything he can do to make it right.