Simon Cowell baby mama Lauren Silverman and her spurned spouse had a summit meeting last night at the family’s $4 million Bridgehampton home, a friend told The Post.

Cuckolded real estate developer Andrew Silverman, who reportedly had no idea his wife’s affair with Cowell was playing out right under his nose, showed up at the Hamptons hideaway, where Lauren has been staying with their 7-year-old son, Thursday evening, a source said. Hours earlier, Lauren stepped out to grocery shop and showed off her baby bump in a long, form fitting dress.

It’s unclear what the couple discussed, but a family friend said Lauren is eager to clean up the messy love triangle. Lauren has a prenup that gives her $3 to $4 million, a friend said, but her pregnancy could change that.

Andrew — who took the unusual step of naming Cowell a co-respondent in divorce papers filed in Manhattan July 15 — was seen leaving the Hamptons home around 9 a.m. in a baseball cap, and speeding away in his Mercedes to avoid photographers.

“My top priority is protecting my 7-year-old son while working to resolve all outstanding issues with my wife,” Andrew said in a statement released before the sitdown with his wife.

Lauren issued a statement of her own saying she is “committed to sorting things out with Andrew as amicably as possible.”

A source yesterday predicted that negotiations may not drag out, noting, “Simon wants this resolved. Ultimately, it’s his problem.”

Cowell has stayed uncharacteristically mum as the scandal unfolds.

“Unfortunately for the moment I have to keep this private,” he told reporters at Fox’s Television Critics Association panel in California yesterday, “There are a lot of things I will eventually clear up.”

Lauren has been staying at the Hamptons vacation home with her son, Adam, and mom, Carole.

“I’d love to defend my daughter but I have been advised not to talk to the press,” Lauren’s mother said.