"No makeup, no suit, no bets, no tickets to the birdcage... no worries," the 31-year-old captioned a selfie of herself and Michael with their arms around each other.
Martha appeared without makeup in the photo, and wore a towelling hotel-style bathrobe.
Michael also posted a lonely selfie sat in a gallery, showing fans he hadn't attended a Cup Day event.
"Anti Racing Racing Club #melbcup" the 28-year-old teacher captioned the snap.
Earlier this week, makeup artist Martha confessed to fans that she's feeling clucky.
The reality TV star-turned-beauty influencer, who became known for covering Cyrell with a glass of red wine on the hit Nine show, took to her Instagram to post a picture of Michael with a child on his shoulders.
"My ovaries just exploded," she captioned the picture.
And she wasn't the only one. Fellow MAFS co-star Mel Lucarelli added: "Mine too."
