JESSICA and ASHLEE SIMPSON are playing amateur therapists – for their parents! 

The National ENQUIRER has learned the siblings are organizing a top-secret family retreat in rural California in a bid to halt their parents’ feud, which has raged since Joe, 56, ended their 34-year marriage with sources claiming he has announced he’s gay.

“The goal is to get their parents talking again, for the good of the family,” an insider tells The ENQUIRER.

“Both girls want to be there to act as peacemakers.”

Joe is believed to be dating his male model client, Jonathan Keith – who was by Joe’s side at Jessica’s wedding – while The ENQUIRER recently revealed that Tina, 54, also has found love, with landscaper Jon Goldstein, whom she brought to Jessica’s nups.