One popular 'Drakken and Shego in love fanfiction' is 'Love in the Shadows'. It beautifully explores their relationship with a lot of character - driven moments. The author does a great job of showing how their feelings develop over time in a way that feels true to their personalities.
Love. Despite their villainous natures, they could have developed deep feelings for each other over time. The kiss could be the culmination of those repressed emotions.
Yes, there are quite a few. You can start by looking on fanfiction websites like FanFiction.net or Archive of Our Own. Just search for 'drakken and shego kiss' and you'll find a variety of stories with different takes on their relationship.
The main appeal is the contrast in their personalities. Drakken is often bumbling and Shego is more competent, so seeing them fall in love creates an interesting dynamic. It's like two opposite poles attracting each other.
One popular trope is the 'enemies to lovers'. Since Shego and Drakken start off as more of an employer - employee relationship with some bickering, this trope fits well. It's exciting to see how their relationship evolves from that to a romantic one.
You can try some popular fanfiction websites like FanFiction.net or Archive of Our Own. They usually have a wide range of fanfictions, and you might be able to find ones about Shego and Drakken's relationship there.
Archive of Our Own (AO3) is also a good option. It has a well - organized tagging system. You can look for the 'drakken' and 'shego' tags and then narrow down your search to stories that involve a kiss between them. Additionally, some smaller fanfiction communities might also have such stories, but they may be a bit harder to find.
Perhaps it's a moment of vulnerability. Drakken might be feeling down about a failed attempt, and Shego, in an uncharacteristically tender moment, kisses him to cheer him up. It shows a different side of their relationship, one that has a bit of emotional depth.