After marriage, Sonic and Amy's relationship would become more stable. They would have a deeper commitment to each other. Sonic would be more protective of Amy, not just as a friend but as a husband. Amy would be more confident in their relationship and might even influence Sonic to slow down a bit and enjoy the quieter moments in life. They would also start building a home together, perhaps a little cottage in the forest where they could relax after all their adventures.
Their relationship would change in several ways. For one, they would have to make decisions together as a couple. In the past, Sonic was more of a lone ranger, but now he would have to consider Amy's feelings and opinions. Amy, on the other hand, would have to learn to give Sonic some space when he needs it for his adventures. They would also develop new traditions as a married couple, like having a special dinner every week or going on monthly dates. Their love would grow deeper as they face life's challenges together.
Well, after getting married, Sonic and Amy's relationship would evolve significantly. Sonic would become more domesticated in a sense. He might start to take on more responsibilities at home, like helping Amy with the chores. Amy would be the one who would bring more warmth and family - like feelings into their relationship. They would also start planning for the future, like having a family of their own. Their communication would improve as they would be more open with each other. They would no longer be just two friends with a crush; they would be life partners, sharing everything, from their joys to their sorrows.