Things took a turn when Tanith caught Mark cheating just one year into their relationship. It left her devastated, feeling like everything she believed about them had fallen apart.
She reflected on that painful time and shared: “We had been together a year, it tore my world apart. It was really hard and I felt like we were in a good place and it was all shattered. We took time to ourselves and I realised that he was worth it.”
Mark admitted: “I’ve always had a tendency to be unfaithful in the past. I guess it’s the feeling of being wanted or that someone is attracted to you. It’s probably not feeling good within yourself, so you’re looking at getting that through other people.”
Despite what happened, Tanith still cared deeply for Mark. Since they lived together and shared a dog, she suggested trying an open relationship as a way to move forward and keep their connection alive.
But Tanith was crushed when she learned that Mark had slept with six women on their very first night in the house—while she had spent the evening alone in their shared room.
That meant each of them would form their own romantic or sexual connections without doing it as a couple.
Effy Blue, a non-monogamy expert featured on the show, suggested they attend different parties that evening.
Right before splitting up, Tanith admitted she was nervous and described the situation as being “thrown in at the deep end.”
She later explained: “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.”
Meanwhile, Tanith didn’t connect with anyone at her party. She ended the night alone, feeling disappointed and thinking about Mark.
Trying to stay focused, she told the camera crew: “I don’t know what Mark has been up to. I think if I thought about that it would be…yeah… no.”
“I’m not really thinking too much about Tanith, otherwise that would distract me from what I’m doing here.
“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.”
Things quickly escalated and ended with the group engaging in a full-blown orgy.
A sneak peek at the next episode shows Mark walking in, and Tanith confronting him by saying: “I’m so humiliated.”
He explained: “I’ve always wanted to do what I want to do when I want to do it,”
He added more honestly: “Sometimes when you find yourself in relationships, you feel trapped. I’ve always felt very much trapped.”