Touting on cheaters - would you tell someone their partner was doing the dirty? @worldinaglass and @EJWoolf debate

What would you do if you found out someone was cheating on their partner? A woman in Iowa in the US learned from a fast food delivery driver that her boyfriend was cheating on her. As a thoughtful surprise, the woman had ordered food to be delivered to her boyfriend. Afterwards she received a call from the delivery driver to say he spotted her boyfriend through the window in just his boxers along with a naked woman. Is this an example of people sticking their nose in when it's not wanted? Or is it morally the right thing to do? Vinny spoke to commentators Andrea Mcveigh and Emma Woolf.