Girlfriends trying to "comfort" JESSICA SIMPSON post-breakup helpfully divulged that dog TONY ROMO hit on not one…not two…but THREE of them while he and Jess were still together!

One friend told her: "We were at a party when you were out of town and I ran into Tony. We were friendly, just talking. But the more he drank, the more friendly he got. Finally, he said, ‘You know, you and I should get together – Jessica doesn’t need to find out!’"

Others said Tony would get "all grabby and kissy-face," but they’d push him away.

The girls never told Jessica, knowing she’d "kill the messenger…or confront Tony, who’d swear the girls were hitting on him, and a stupid war would start," said the friend.

"This is tearing Jessica apart. Every guy she’s been with lately, like JOHN MAYER and Tony, have had womanizing issues. She’s picking ’em worse, not better."