TMZ has learned ... Myla is telling friends she will testify that Kris repeatedly told her Kim defrauded him in the marriage, grousing that he "got played."
Kris is fighting the divorce, insisting on an annulment based on fraud. Kris claims Kim never loved him and married him only to spike ratings on her reality show.
Myla says Kris -- who made hundreds of thousands of dollars off "Keeping Up with the Kardashians" as well as the wedding special -- "hated the cameras and his life being on display."
Myla is telling friends her relationship with Kris is "dead," so she has nothing to lose by telling the truth, and therefore she will be "100% honest" in answering questions during the depo.
The wild card -- Myla is not saying how she will answer questions about allegedly getting knocked up by Kris. She previously told various people he got her pregnant ... then recanted the story.