Christopher's become very protective of Danniella but doesn't feel that he can get his feelings heard with Gemma around. At least he has spoken to Darren and aired his views of what he's seeing Gemma do to Danniella.
Gemma needs a sidekick, she needs to have someone next to her agreeing with her, and she is stronger with Danniella in that house. As soon as Danniella off her own back, went up to apologise to Stephanie, Gemma snapped into self-protection mode and did the same. She knew it wouldn't look good on herself if she didn't , and she wanted it to appear to the others that Danniella and her were still very 'tight' and that they are a team and think the same way. This was very manipulative of Gemma, she's no fool I give her that !
I like Christopher now, he's not as 'wet' as I thought. He did have the guts to nominate Gemma and received a really spiteful backlash from Don Gemmiolee after one of the tasks, but I hope he has the guts to speak out a bit more as he's right in what he thinks.