Married At First Sight's Billy Vincent is determined to show his 'ex-wife', Susie Bradley, just what she's missing.

Taking to Instagram on Tuesday, the 28-year-old reality star shared a photo of himself wearing just a black and white striped tank top and no pants.

The photo - which appears to have been an ad for supplements - sees Billy protecting his modesty with his dog, who he's seen clutching in one arm.

'Don't get caught with your pants down and your oxyshred in some else's cupboard... always double stack... be safe kids,' he captioned the photo.

Interestingly, Billy posted the photo just three minutes after his ex on Married At First Sight, Susie, 25, was seen posing alongside fellow MAFS star Tamara Joy in a swimsuit.

Tamara, 28, shared the racy photo on her Instagram page, showing herself and Susie modelling one-piece swimsuits in the mirror.

'Just a little one piece action #bikini #bikinishoot,' she captioned it. 

Billy and Susie had a tumultuous relationship on Married At First Sight, which ultimately ended up being short-lived.

In an interview with TV WEEK this month, Billy claimed Susie never went on the show looking for love.  

'She was 110 per cent on it for fame,' he told the publication.

'She only wanted to give me affection when the cameras were rolling.'

Since going their separate ways, Susie has been dating controversial rugby league footballer Todd Carney, 32, who she was first spotted with in February.