i think they had sex

I really want to know. I agree that they might be making us think it's a huge deal and then we'll eventually find out it's something really stupid.

I Agree With Thee Fact That They Are Building It Up For Something Huge But Its Nufin Really,, But I also Think That We Might Not Find Out :)

It wasn't anything sexual, they are related ffs! It would have been something uncomfortable yet hilarious.

Agree with Kylie90210. I dont think it was anything sexual, just something really awkward woulda happened.

I do not believe they had sex at all.Do not forget we do not know what age jason was when they went fishing. In episodes it is mentioned; it is legal in britain did not say britain alone and Bryn also mentioned to Dave I think " it was cold".
So my conclusion simple. "They shared a sleeping bag to keep warm".

It's a question only James or Ruth could answer,as creating the storyline they obviously had to have the fishing trip saga unfold,even though they never reveal the secret.