Marvin, a former member of the boy band JLS, has been facing his fears, skydiving into the jungle before taking a Temple of Doom challenge in which he, Jamie Lynn Spears, and Nick Pickard claimed all six stars.
Rochelle spilled a big secret about the programme, however, revealing that she gets a courtesy call every day about how Marvin is doing – despite being banned from having any contact with him.
"The producer calls us earlier on in the day and they say, ‘This is what’s going to happen tonight,’ and they tell me that he’s doing okay. It’s sort of a courtesy call," she said on the show.
"And yesterday, she said at one point tonight, he does serenade Jamie Lynn Spears in the bath. And I was like, good job I’m not the jealous type whilst I’m here with his kids.
"But when I watched it, I understood it a lot more," Rochelle added. "I realised that I don’t ever want him to do that for me. She just wanted to chill."
Co-host Dermot O’Leary laughed at the way the producer had portrayed the incident in the bath.
"The producers definitely oversold that for you. There were like five other people around too," he said.
Ahead of his jungle stint, Marvin revealed his wife Rochelle had a hilarious reaction to his announcement he was going on the show.
"When I first told Rochelle, she thought I was doing a prank on her. She thought I was nuts and she still can't believe I'm doing it!" he said.
"This is the most daring thing I have ever done and I have never challenged myself this way before. It's one million per cent harder than performing on stage and I woke up with knots in my stomach this morning thinking about it. But this programme has been on my bucket list for years. It's the first time I've been asked to do it so I jumped at the opportunity."
Admitting his family would be at the front of his mind at all times, he added: "They are going to be at the forefront of my mind every time. I can't let them down. I have got to get stuck in and be brave as they are going to be watching."
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