Their relationship would likely become more collaborative. They would have to communicate regularly about Teddy's needs, like his schoolwork, his magical training, and his emotional well - being. This would force them to put aside their past grudges and start seeing each other in a new light.
One possible storyline could be that Harry and Draco initially struggle to get along while trying to care for Teddy. They might have different parenting styles, with Harry being more lenient perhaps due to his own lack of a strict parental figure growing up, and Draco being more traditional in his approach. As they work through their differences, they start to bond not only with Teddy but also with each other. Teddy, on his part, could be having trouble adjusting to the new situation at first, missing his grandmother Andromeda. But as time passes, he grows to love his new dads.
In the fanfiction, perhaps the Ministry of Magic has some concerns about Hermione and Draco adopting Teddy. Since Teddy is the son of Remus Lupin and Nymphadora Tonks, and with his werewolf heritage, they might have to go through a lot of red tape. Hermione, being the brilliant witch she is, would use her knowledge of the law to fight for their right to adopt Teddy. Draco, on the other hand, would use his family's influence and wealth in a more positive way this time. Teddy would start to see them as his real parents, and they would have to deal with the challenges of raising a magical child who has unique abilities and needs.
Their relationship would become more collaborative. They would have to work together to raise Teddy, which means sharing responsibilities, making decisions together, and supporting each other. For example, when Teddy has a problem at school, they would need to sit down and figure out the best way to handle it, instead of being at odds like they used to be.
Maybe at first Teddy is a bit shy and reserved, but as Harry and Ginny show him love and support, he begins to open up. They could also have some challenges like dealing with Teddy's occasional magical outbursts that come with his young age and powerful magic inheritance. Harry, having been through so much himself, can be a great mentor to Teddy in controlling his magic.
Well, perhaps the plot could involve Harry and Draco putting aside their past differences to give Teddy a stable and loving home. They might struggle at first with co - parenting due to their long - standing rivalry. But as they get to know Teddy better and see how much he needs them, they start to work together more smoothly. Maybe they also have to protect Teddy from some dark forces that are after him because of his parents' history.
It might become stronger. Adopting Teddy would give them a shared purpose and responsibility. They would have to work together to raise Teddy, which would deepen their bond.
In this fanfiction, the character dynamics would be full of growth. Harry, who has always seen Draco as a bit of a foe, would have to adjust his view. Draco, on the other hand, would have to learn to be more selfless, like Harry. Teddy's presence would force them to communicate more openly. They might argue about how to raise Teddy at times, but these arguments could also lead to a deeper understanding of each other's values. For instance, Draco might value discipline more while Harry might focus on freedom, and they'd have to find a middle ground for Teddy.
One possibility could be that in this fanfiction, Hermione and Draco put aside their differences from their Hogwarts days. They might raise Teddy in a world that is slowly recovering from the war. Hermione could use her intelligence and knowledge to educate Teddy, while Draco might teach him about the wizarding world's more complex social aspects. Maybe Teddy grows up with a unique perspective, influenced by both Gryffindor and Slytherin values.
He might be initially shocked. Snape is not used to receiving such cute and unexpected gifts. He could stare at the teddy bear in disbelief for a moment.