She'd better thank him.
I just checked her credits again ... and she's literally had nothing published from a legitimate press that isn't some sort of collaboration with Keith (with 85 percent of that being throwaway Star Wars YA crap). And, seriously, who's to say that — much like our good friend Fuzzy Herbert — she's actually done any of the writing?
TheKJA has mentioned more than once that she's got a good sense of the publishing business. Which is fine, but that doesn't make her an author. At this point, I'm afraid there's not a shred of evidence that "international bestselling author" Becky Moesta has ever written a word of fiction in her life. Hell, with The Other Guy, they at least pretend to photograph him with a computer.
"Anything I write will be remembered and listed in bibliographies on Dune for several hundred years ..." — some delusional halfwit troll.