GREATdadBADhusband wrote:the "legalities" (if any) of stopping those direct depost CS payments to her.
There are no 'legalities'. In the absence of a signed order by the judge, simply stop paying. There will be no legal repercussions. She would look like a fool claiming that you owed her child support when 1) it was never ordered and 2) the child is with you.
Stop worrying, cut her off.
'To argue with a person who has renounced the use of reason is like administering medicine to the dead.' -Thomas Paine