Rachael Wilde and her co-workers were on a long-haul flight when they spotted a married man in the row ahead cheating in plain sight with a stranger he’d just met.

The young CEO and her team were travelling from Sydney to London when they found themselves in an incredibly awkward situation.

What started as a ‘wholesome’ conversation where the older man shared details about his life – and his wife – quickly escalated into the pair ‘openly hooking up’ mid-flight.

The man in question was in the middle seat, while the ’20-something-year-old’ woman was by the window.

‘We were so excited to be on the plane, we didn’t think anything of it. They were talking and we thought, “Oh that’s so nice, these strangers in front of us are talking”,’ Rachael said in a video.

‘He was talking about his wife so he was clearly married.’

As Rachael, Maddie and Lauren sat in the row behind, they overheard everything about the man’s life – including his name, occupation, hometown and even where he went to university.

When the lights went out, the girls began to rest their eyes – but were soon woken by the two strangers getting hot and heavy.

‘It just seemed really wholesome. They started getting drinks, he started ordering lots of gin and tonics. They were getting a little bit more rowdy,’ Rachael explained.

‘The guy next to them put his earphones on and starts watching a movie. Now it’s just the married man and this 20-something-year-old girl chatting.

‘I go to sleep… and this is when it happened.’

The co-workers said things took an extremely uncomfortable turn when the girl sitting next to the window needed to go to the bathroom.

‘Old mate in the aisle got up and then the one in the middle stayed put,’ Lauren said.

‘She basically was like “Oh sorry”, then straddled him – no joke. She straddled him for three seconds, made eye contact (with him).

‘The girl came back (from the toilet) and that’s when it all kicked off. The tension was felt on the plane.’

Maddie stood up – pretending to go to the bathroom just to see what was going on in front of them, as the noises had started to sound increasingly intimate.

To her surprise and disbelief, Maddie noticed the two passengers getting a little too comfortable under the blanket – as she looked at her co-workers in shock.

‘She asked for the blanket and then I stood up again five minutes later and saw the blanket was over the two of them,’ she explained.

‘That’s when it started getting bad.’

But it wasn’t just the co-workers who noticed the steamy encounter mid-flight.

‘When the flight attendant dropped off their drinks towards the end of the flight, she said to them “behave yourselves” so she HAD to know what was going on,’ Rachael said.

The co-workers were mortified as they caught the pair getting a little risqué.

‘We just saw them getting closer. He was leaning over her and she was talking about what was out the window. She was like, “Oh look at the stars… they’re so good”,’ Rachael recalled.

The co-workers said it sounded like things escalated sexually from there.

‘We were like, “Oh my god, surely we’re hearing things”,’ Rachael said.

‘Then five minutes later, they just lean over and they’re hooking up.’

When the plane landed, the trio overheard the woman asking the man, ‘Where to next?’

It’s unclear what happened between the two strangers but the co-workers were ‘traumatised’ from what they’d witnessed.

‘We literally know everything about him,’ Rachael said.

‘We know his first name, we know he was there on a business work trip, we know where he’s from and what uni he went to.

‘Don’t know if he’s in an open marriage or what’s going on. I really hope that’s the case because I feel really bad for the wife. It’s disgusting behaviour. They sat in front of the wrong girls.

‘Still not over it.’

Rachael – who was travelling to the UK with her team to promote her skincare brand The Breakout Hack – filmed their mid-flight reaction, which shows her and the co-workers looking horrified.

The video has been viewed more than 90,000 times, with one joking: ‘What kind of upgrade did he get?’

‘Might be the guy I went on a date with at the start of the year he worked in (same career) and was married but none of that was on his Hinge profile,’ another shared.

‘This gave me bad goosebumps,’ one revealed.

‘I would have pressed that call button so fast and outed them both. Nothing like a little public shaming,’ another suggested.

While one added: ‘This happened to me, worst flight ever.’