The former glamour model spent the weekend with her family, and later uploaded a snap of herself and Kieran showing off their tummies.
Katie and Kieran are both laughing in the snap, with chocolate eggs balancing on their stomachs, which are looking rather different.
In the accompanying caption, Katie jokes: "Look at our six packs and summer bodies".
That hasn’t stopped Katie from discussing Kieran’s well-documented cheating though, and she’s discussed his affair with her former pal Jane Pountney a number of times.
“I know Derrick and Jane are divorcing,” she revealed in March. “Whatever she did I will never forgive her, and I'm just so glad her life is ruined.
“It's weird, Derrick and I have never been angry at Kieran, it's more Jane we're shocked by. I think because she'd dramatically changed.”