I have watched the interview with her partner, I feel that his laugh is a nervous/bewildered laugh. He's hardly saying "haha this is all so funny, my partner's missing and it's hilarious hahahah" is he? He has 2 young children at home, he's probably trying to keep upbeat for them. We don't know what he has told them. People say I couldn't smile if my partner was missing like this, you don't know what you would do. You might have to keep up a normal appearance for your children, mum's gone away, she will be back soon, playing, smiling laughing with them. I'm not saying he's not involved or he is involved because, at this point, there are a number of scenarios, but I don't think a nervous laugh is enough to say he is dodgy.