Gary 'Gaz' Beadle has left Charlotte Crosby devastated after taking part in a threesome on TV.

Charlotte Crosby and Gaz Beadle

Charlotte Crosby and Gaz Beadle

The reality TV star upset his on/off girlfriend and 'Geordie Shore' co-star Charlotte when he reportedly bedded Charlotte Dawson and Olivia Walsh on the latest series of 'Ex on the Beach' which was filmed in Thailand.

A source told The Sun: "Gaz and the girls barely knew each other, but they were determined to make this the raunchiest series of 'Ex on the Beach' ever and jumped into bed with each other pretty much as soon as the cameras were on.

"It was a total free for all and even though Gaz has slept with over 1,000 women, it'll be a night he never forgets. He definitely wasn't thinking about how Charlotte C may feel."

And this is the latest blow for Charlotte, after Gaz previously enjoyed a steamy fling with co-star Jemma Lucy.

The insider added: "Charlotte fell hard for Gaz and every new revelation about his antics in Thailand is another knife in the back.

"She was devastated enough to walk away from 'Geordie Shore' when it was just one girl, Jemma. This will crush her."

Charlotte previously admitted she and Gaz have never been "official" but said it is difficult to watch him flirt with other women on 'Ex on the Beach'.

She said: "It is hard because we're not together. He can't really say, 'No because I'm with Charlotte'. It's just a really difficult, weird situation to be in. I'm going to have to just wait until he comes out. I'm hoping nothing is going to happen.

"There are moments where I feel like I want to say I love Gary, but I think we're both scared to say it, because what does it mean once we've said that? It's been like this for FIVE years."