Okay, so this isn't Google Maps, it's Yandex Maps, the Russian clone of the service. A woman used Yandex Maps to look up a business where she saw her fiancĂ© and boyfriend of five years arm in arm with another woman. When the man came home she had him look up the business and simply watched the look on his face. He confessed immediately, and said that he didn't love the other woman, but our Slavic heroine had already decided that it was over.
We've seen all sort of weird stuff, like a naked old lady mowing the lawn or a 20' home made rocket, on Google Street View, but we don't think we've ever seen infidelity before.