A source told The Sun: "He seemed really fixated. He told her she had 'a great figure' and laughed at all her jokes."
The report added that the couple are planning a meal together at the restaurant in Greater Manchester.
Read more: Stacey Giggs looks tearful as she parties with fellow WAG following 'split'
It was described as “the last straw” for Stacey in the wake of Ryan's affairs with model Imogen Thomas and sister-in-law Natasha – his brother Rhodri’s wife.
Read more: Ryan Giggs flirts with admiring women at restaurant bash in final blow to his wife
Giggs, who stayed briefly with his mother Lynne in the early days of his split from Stacey, is determined to remain at the couple's Worsley mansion – which was vandalised with graffiti late last week – for as long as possible.
Read more: Love cheat Ryan Giggs could lose half of his £40million fortune in divorce fight with wife Stacey
He and Stacey are trying to keep things as normal as possible for the sake of their children.
A pal previously said: "Ryan and Stacey are still living in the same house but they’re not living in separate parts of the building.
"They are still speaking to each other. He’s the father of the children and those two are the most important thing for both of them."
Read more: The love rat's shocking sex scandals that rocked their marriage
She was further rocked when it was reported he had struck up another flirty relationship with public relations girl Kate Greville.
He allegedly showered her with gifts as she helped promote his £24million Hotel Football venture last year. He part-owns it with former team-mate Gary Neville.
We have contacted reps for Ryan and Stephanie for comment.
