Perhaps it's a plot device in a time - travel fanfiction. A character travels back in time and tries to prevent Watts from becoming evil. In the process, a relationship develops between them, and the kiss is a significant moment that changes the course of events in the RWBY world.
You can try searching on fanfiction websites like Archive of Our Own (AO3). There are often a lot of RWBY - related fanfictions there. Just use the search bar and type in relevant keywords like 'RWBY Arthur Watts kiss' to narrow down the results.
One common theme is his intellect. Many fanfictions explore how his brilliant mind works, whether it's devising new plans or outsmarting his enemies. Another theme is his loyalty, or lack thereof. Some stories focus on his shifting allegiances and what drives him to change sides or stay true to certain causes.
One great RWBY Watts fanfiction is 'The Fall of Watts' on FanFiction.net. It delves deep into Watts' backstory and his motives within the RWBY universe. It's really interesting to see how the author portrays his intelligence and his relationship with other characters.
One idea could be that Arthur Morgan somehow gets transported to the RWBY universe. He could use his skills as a gunslinger and survivalist to help the RWBY characters in their battles against Grimm. Maybe he teams up with Ruby and teaches her some of his unique combat techniques.
Arthur Morgan could fit in as a mentor figure. His experience in combat and dealing with difficult situations would make him a great teacher for the RWBY students. For example, he could show them how to be more resourceful in the wild, which would be useful when they are on missions in less - civilized areas.
Shanann Watts was a pregnant woman who was tragically murdered. Her husband, Chris Watts, was responsible for her death. He had an affair and wanted to start a new life without his family. He first killed Shanann and then their two young daughters. It was a very sad and disturbing case that shocked the community.
The Watts family case is a tragic one. Chris Watts killed his pregnant wife Shanann and their two young daughters. He had an affair and his actions were completely immoral and cruel. It shocked the community and the world at large.