e-dultery
cheating using the internet, mostly by talking to someone online until you're too dumb to care about your spouse.
"My wife caught me messaging my e-lover. She said she was going to kill me."
"I told my husband I was going to work. I was actually eating pizza with my e-buddy."
"My online fling said he was going to propose. I said I was going to propose. Now we're both dumb."