Working his magic! Big Brother's Lawson Reeves strips down to red hot underwear and cheekily poses with housemate fling Cat Law for charity 

It has been a few months since they left the Big Brother house, and it seems scandalous housemates Lawson Reeves and Cat Law are still inseparable. 

The 23-year-old magician, who cheated on his girlfriend with 31-year-old midwife Cat, left little to the imagination as they stripped down to their underwear in new Instagram snaps. 

But in this case, flashing some flesh is all for a good cause, with the pair participating in Cupid's Undie Run to raise funds for the Children's Tumour Foundation. 

Working his magic: Big Brother star Lawson Reeves wasn’t afraid to flash some flesh on Tuesday for a photo shoot for Cupid’s Undie Run to raise funds for the Children’s Tumour Foundation

Taking to Instagram on Tuesday, Cat shared a photo of herself and Lawson wearing bright red boyleg style underwear. 

'Couldn't get us to put our pants on. Cupid's undie run #cupidsundierun #childrenstumourfoundation #bebrave @lawsonreeves91 @liinagee @zoeoee,' she captioned the photo.  

The words 'I'm with Cupid,' were splashed across the vibrant briefs, with Cat wearing a white printed T-shirt and Lawson sporting a red one.  

Cheeky: Lawson was joined on the beachside photo shoot by fellow Big Brother stars Cat Law and Lina Grant as well as The Bachelor star Zoe O’Brien

Red hot: Each reality star sported a pair of bright red briefs and flaunted their legs

Standing on the beach, Cat checked out the younger male Big Brother housemate, while Lawson worked on perfecting his sexy stare. 

His black trousers had been pulled down to his ankles, revealing a generous glimpse of his legs.

The pair, who continue to keep fans guessing as to whether they are actually dating on the outside, were joined by two other reality stars. 

Fellow big Brother star Lina Grant and The Bachelor contestant Zoe O'Brien showed off their toned legs in identical briefs and T-shirts. 

In another snap posted on Cat's social media account, she was joined by Lawson and Lina as they cheekily flash only a hint of their charity underwear. 

Going strong: It has been a few months since they left the Big Brother house, and it seems scandalous housemates Lawson Reeves and Cat Law are still inseparable

Reality love: Lawson and Cat put social media into a frenzy last year when they pursued a romantic relationship in the Big Brother house

With their backs to the camera, the reality star trio were seen taking direction from the photographer on the beachside set. 

Not afraid to have his solo snap taken, Lawson shared another closeup image onto his Instagram account. 

'The silly fun we have for charity. @cupidsundierunoz #cupidsundierun #bebrave #charity #pretendtobesexywasmydirection #raisingmoney #funrun #childrenstumourfoundatiom @stkildabeach,' the magician captioned the image in which he had taken off his T-shirt to reveal a bare torso. 

Clutching his trousers belt, the reality star cheekily rested one finger on his lips. 

Lawson and Cat put social media into a frenzy last year when they pursued a romantic relationship in the Big Brother house while Lawson was still in a relationship with girlfriend Candice Leeder.