ROB'S KISS & TELL LEAVES SOUR TASTE

Demi turns back on Brat Pack bozo

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DEVASTATED Demi Moore is furious that Rob Lowe has chosen this moment to blab about their ’80s fling — just when she’s preparing to say goodbye to her beloved ex-husband Bruce Willis, sources snitch!

Insiders dish Demi, 62, thinks it was mean and even dimwitted for Rob, 60, to stir the pot now by revealing their long-ago hookup while making the 1985 Brat Pack flick St. Elmo’s Fire.