It could be an unexpected character. Maybe an old mentor of Sly's who has since retired from the thieving world. He could bring a wealth of knowledge and wisdom to the baby's life. Or perhaps a civilian who Sly and Carmelita have befriended during their adventures, someone with a big heart and a lot of love to give, could be the godparent.
Perhaps the plot involves Sly and Carmelita having to hide their baby from the public eye at first. Since Sly has a criminal past (even if he's reformed) and Carmelita is a police officer, their relationship and now a baby together could cause a stir. They may have to go into hiding, which then leads to a series of adventures where they discover new things about each other and their relationship while protecting their baby.
I don't have any information indicating who Carmelita Sly is. It could be an individual with a very specific identity in a particular place, or perhaps a character created for a certain story, movie, or game that is not widely known.
A fanfiction of Sly Cooper and Carmelita getting married could be full of twists and turns. For example, just as they are about to say their vows, one of Sly's old foes could show up with a plan to disrupt the wedding. But Sly and Carmelita, being the strong characters they are, team up to defeat the foe and then continue with their wedding. Their relationship has always been complex, with Carmelita chasing Sly in the past. Now, as they get married, it symbolizes a new chapter where they are on the same side, facing the future together, and their love overcomes all the past differences and challenges.
Sly could use his agility and charm. He might show off some of his acrobatic skills in a non - showy, but still impressive way. For instance, if they are having a gathering in a garden and something needs to be retrieved from a high tree branch, Sly could easily jump up and get it, making it look effortless.
Definitely Bentley. His intelligence and gadget - making skills can play a crucial role in the fanfic. Murray too, his loyalty and strength can be used in various action - packed scenes. Another character could be Carmelita's police colleagues. They can create some tension between Sly and Carmelita, as they don't trust Sly at all. Plus, the Panda King could be an interesting side character, with his unique abilities and backstory.
A less common but still present theme is the idea of changing for the better. Sly might be inspired by Carmelita to become a better person, not just in terms of his thieving ways but also in his general outlook on life. Similarly, Carmelita could learn to be more open - minded from Sly. These themes make the Sly and Carmelita fanfictions really interesting to read.
One common theme is the struggle between their two worlds. Sly being a thief and Carmelita being a law enforcer. Their love has to overcome this huge obstacle.
Sly would probably be initially shocked. But then he'd be overjoyed. He'd start making plans to keep her and the baby safe. He might even consider retiring from his thieving ways to be a full - time family man.
There's a fanfiction called 'A New Understanding'. It takes place in an alternate universe where Sly and Carmelita meet under different circumstances. Instead of starting as enemies, they meet as allies against a greater threat. The story slowly builds their relationship, and it's interesting to see how their personalities mesh in this new scenario.