I agree with others that the second link with the same as everyone else that he has logged in and searched for something and he's logged out since and you need to be logged in to access that page/ area of the site that's why you cannot access it.
If he's only been on the homepage?
If he was on the homepage he'd have to actually search for it, meaning he's looking into joining a website specifically for people to cheat on their partner.
^ this is not necessarily true I've heard people and friends talk about this site (Mostly bad things) and I googled it to see what everyone was on about I never got as far as logging in, I did wonder if anyone I knew was on there. Its the sort of site I could see my mums ex being on! I went to view it but it doesn't mean I actively went there to cheat on my partner!
I went there today does that mean I'm guilty because I searched for a site that allows me to actively cheat on my partner? :s
He is in the wrong here and there is evidence pointing towards further access to the site which I'm not disputing that but to say because you have just visited any sites homepage of this nature therefore you are there to actively looking cheat isn't always the case.