ExH became distant, there was no 'chatting' about day to day stuff, just the bare minimum. His phone became surgically attached to him, he started having secret passwords and pins.
He became concerned about his appearance, he started having more 'boys' nights out.'
He became cross with me really quickly over innocent remarks made by me that were, in retrospect, getting close to questioning his lies. Like when he got a speeding fine after visiting his dad, but the time it stated seemed rather strange. He'd visited his dad for 1/2 hour then spent the next 2 hours with the OW.
Sex became non-existent, I started to feel uncomfortable about him seeing me naked.
I found out his 'friend' at work had changed her status to 'separated' on Facebook while snooping on his account, big event, he'd not mentioned it. He then changed his password and security settings on Facebook, telling me he'd done it weeks ago on the advice of work (security type job) but I was suspicious so asked him to show me how to change mine, and his settings showed he'd changed it the night before, not weeks ago.
I started snooping, found he'd set up a new email account that I couldn't access. I asked him what the benefit was of these 'hotmail' accounts and why he had one for Facebook, some excuse. The new email account was gmail, I asked him how may email accounts he had, he said two, usual one and Facebook hotmail one. Liar.
Finally persuaded him that he was making me paranoid with all his password changes, he changed his phone pin back to reassure me. I pinched his phone and has to activate this hidden email account in the settings and found all his secret correspondence. He left the same day, decree absolute came through last week, 16 months later. 