Meanwhile, Michael also shared a snap of the couple laying in the sunshine together in the park.
The ex-teacher seemed to ridicule rumours of their break up in his caption.
"Let her off the leash for a minute, now she’s back," he wrote.
Fans of the couple became concerned last week and began asking questions after Martha shared a shared a video of herself in a bikini last Thursday.
"Where's Michael?" asked one person, but Martha did not respond.
Another concerned fan wrote: "I hope you and Michael are still together, you have so much fun."
While Martha was parading around in her bikini on her Instagram profile, Michael posted a lonely selfie on Thursday, detailing the reasons why he has said goodbye to his teaching job.
"I’ve had the best job in the world and I’ve cherished every moment of the last 7 years helping shape the lives of the kids I’ve taught, but the time has come for me to explore the other areas of health and well-being I can positively impact," he wrote.
Adding: "Stepping away from my full time teaching job was a decision I didn’t make lightly. Every time I think about the kids it tears at my heart."