Is he cheating POF in history

So, i was using my fiances phone to find a website that he asked me to bring up on my phone... so, i wentbto his history looking for it... when I came across 3 history searches... back to back

Pof main page, pof password reset and then pof main page again.

That was it... as if history was deleted possibly... i dont know...

Anyway... i I confronted him... he lied about it, told me he didn't know what I was talking about.. when I told him I had proof he went onto it... he then said he did... but it was to delete his account because they kept sending him emails and he didnt want me to get suspicious if I saw the emails.

When i told him it was suspicious still he stormed out of the house...

What do you think? Could it have been to delete an account? I have never been on there i know nothing about this website, just that it is for dating. Or... is it for more? How would I find out?