The 55-year-old recently split with her husband of 18 years, Steve Vaughan.
It was reported that the interior designer found out her husband was seeing 57-year-old Melbourne mother Andi, who was one of his personal training clients and bears a striking resemblance to his TV star wife.
Andi posted a loved-up photo of herself and Steve a few days after Christmas, adding a caption that confirmed they were now living under the same roof.
“I have just had the most amazing Christmas starting from 1st of December,” Andi wrote.
“Steve Vaughan has brought so much Christmas spirit, love and family time into our home,” she continued, adding, “I love you Scuba Steve. Stay you.”
But while Shaynna remained tight-lipped about the break-up at the time, at the beginning of December she alluded to how she was now doing, insisting, “I feel great!” in an interview, adding, “Onwards and upwards”.
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