Since the disastrous end that your two's relationship had, somehow and without reaching a prior agreement, both of you act as if you didn't know each other at all in life, no one in the office would guess that you two are an ex-couple

And since it's not screwed up enough to have to see how Vince moved on, now with his new girlfriend, what's screwed up is having to avoid him all the time... although sometimes it's impossible

Just now, both of you took the same elevator down after a long day of work, and normally you would both choose to ignore each other... but the elevator gets stuck "Shit! Really? Right now?" Says Vince, pressing the button that opens the doors, without success