Woman left 'humiliated' after boyfriend has orgy with six other women on TV show

A reality TV show contestant has admitted that she was left feeling 'shattered' after her boyfriend took part in an orgy with six other women.

It feels like there's a show for just about anything and everything nowadays, and you can see this in its full glory with Channel 4's Open House: The Great Sex Experiment.

The show features couples going into a luxury retreat with non-monogamous people who aim to help them achieve their sexual desires.

It looks to see if relationships can keep going strong without monogamy, with the help of sex and relationship coaches and therapists to help them along the way.

Tanith and Mark are the latest couple to make an appearance on the show, with the West Yorkshire couple having been together for two and a half years prior to making their debut on the TV series.

The pair had very different experiences in the house (Channel 4)

While Tanith, 30, had her mind on a wedding and starting a family, Mark, 40, spoke about being 'trapped' and having a 'wandering eye.'

In fact, the Brit was caught cheating just a year into the relationship, an experience that Tanith said 'tore my world apart.'

But in the end, she decided he was worth it, despite Mark saying he 'had a tendency to be unfaithful in the past,' as he admitted it may be due to a lack self-confidence.

Tanith came up with the idea to open the relationship up as she wanted it to work with Mark and wanted to explore the lifestyle.

The decision seemed to backfire though, when Mark had his way with six women at the same time on the show, with his girlfriend feeling 'humiliated' as a result.

It all happened during a non-monogamous party, and while Tanith didn't feel a connection with anyone and went to bed alone on their first night in the Open House, Mark was living it up.

While they went on the show with the notion that they were going to open up their relationship separately, and not as a pair, Tanith was left heartbroken.

Mark took advantage of the non-monogamous aspect on the first night. Six times. (Channel 4)

A non-monogamy coach on the show thought it would be good for the two to attend different parties and mingle, with Mark much more comfortable than his significant other.

"Something that would be difficult for me in this if one of us did something and the other one didn't, that would be the hardest thing," Tanith said beforehand.

While Mark was out having lap dances and French kisses with women around him, Tanith was trying her best not to think about her boyfriend, admitting it was hard to the camera crew.

On the other hand, Mark admitted he wasn't 'thinking too much about Tanith', adding: "I'm eager to get out there and have a good night, I'm just looking forward to having fun and seeing what happens.

"I didn't expect it to be going like this but I'm kind of going with the flow and if everyone's comfortable and happy, then what will be, will be."

In the end, Mark took all six women around him to a hut in the garden of the house for an orgy, while Tanith opened her window and stared at the hut, wondering what he was doing.

It's a heartbreaking watch, with the preview for episode two showing Tanith turning to Mark and admitting that she was 'so humiliated' by what he did.