The pair, who met on the reality TV show in 2015, announced they were expecting their second child together in February this year, with Snez letting slip their new bundle of joy is due any day now.
But it was Sam's indiscreet antics that may have left him in hot water with his heavily-pregnant wife.
Taking to Instagram on Thursday, Sam joked he'd caught Snez off guard as he shared a photo of her naked in the bathroom with his 272k followers.
"You've never seen a 39 weeks pregnant women move sooo fast," Sam captioned the cheeky shot, while covering her modesty with a peach emoji.
Sam and Snez tied the knot in Byron Bay late last year and are now preparing to welcome their second child together - another daughter.
Snezana is also mum to daughter Eve, 14, from a previous marriage.