e-cheating
Your spouse gets mad because you're chatting with some guy or girl on MySpace, and you're still acting like you're in love with them even though you're clearly not.
I'm talking to my ex on MySpace, and I'm still pretending to like you.
He left me a comment on MySpace, and I still responded to it while I was married.
She's talking to my ex, and I'm still pretending I don't know about it.