Naw. I heard this directly from Kim and her husband when Kim came to do a comedy concert years ago at Howard. During an interview with the student news show, Coles and her husband (at the time), were telling us how Kim Wayans had Coles forced off the show due to being jealous of the shine Coles was getting at her expense. They said Keenan started to give all the material to his sister to keep her happy.
The husband was cussing out the whole Wayans family off camera... lol.
Damn. Well at least it worked out for her (Coles) getting the show living single. She's more famous for that than living color.