ahh, rare bones smut. i don't know what author you wanted to be like you're trying to make characters as appear as they are on the tv then slowly make them out of character or have fun with characters and you will make them as you see fits? you could use suggestion from below, the one with sweets snap his finger to force bones transform into slutty personality. i'm sucked at giving ideas or suggestion but if you wants some suggestion.
you could force bones into having some kind of therapy for whatver she did and sweets at first do actually therapy stuff before disgusing therapy to use hypnosis. from there, you could make her completely out of character and becomes slutty whenever sweets wants to or you could make her sleep and sweets have his way again just like this chapter but records all of the "sessions" for blackmail material as means slowly break her so you don't have to completely make her out of character. you could also make sweets hypnotizing everyone, including booth, so sweets doesn't gets caught with his crimes like if they do gets caught then sweets can hypnotize whoever into "forgetting".
I'm hopefully that you will write more chapters of this story. You could make Sweets learn to use hypnosis on Bones similar to your Gaius story or use hypnosis on Bones to make her forget/then remember by using hypnosis words thing.
please tell me you're still working on your Sarah story, would love to see more of that too