TRUMP & MELANIA'S MARRIAGE ON BRINK!

She's threatening to walk over how Donald treats Barron

DOUBLE-CROSSING blowhard Donald Trump has pushed his intensely private wife, Melania, to the brink of a $2 billion divorce by shamefully dragging their sheltered 17-year-old son, Barron, into the middle of his troubled campaign after promising to keep the kid clear of politics, spies say!

Brazen three-times indicted Trump, 77, shocked even his followers when he threw a photo of the rarely seen high schooler into a social media post attempting to belittle the sitting president, saying: “In an effort to level the playing field, Barron Trump will debate Joe Biden!”

The 53-year-old former first lady — who has been deeply protective of her only child — is reportedly seething with fury over her hubby’s use of Barron as a political pawn.

“Melania has been incredibly protective of Barron and has told Donald she would not stand for him to be exploited by anyone, even his father!” a source spills.

“He made a promise to protect their son — and he broke it. There’s a good chance she won’t forgive him, and the next time we see them together may be in divorce court.”

Melania is already deeply shaken by the mounting criminal probes of her husband and considers his decision to trot out Barron a personal betrayal she can’t forgive, sources say.