Mother of Michael Jackson's Children Supports Joint Guardianship... But

Rowe filed the documents in L.A. County Superior Court today ... saying she has reviewed the co-guardianship application and signed off on the deal reached between TJ and Katherine to share parenting responsibilities for Paris, Blanket and Prince.

But in the docs, Debbie warns ... "Should the arrangement sought by TJ Jackson and Katherine Jackson become untenable, unstable, unsafe, or in any way contrary to the best interests of the children, Ms. Rowe will seek court intervention."

Rowe claims her concern is for the health, safety and well-being of HER children; and says she will continue to ensure their needs are met.