This sounds like a movie, but not with the happy ending you'd expect.
A couple in Bosnia is filing for divorce after they found out they were each having an online affair... but they were having an online affair with each other. *cue The Pina Colada song*
The pair "met" in an online chat forum under fake names and both poured their hearts to each other about their marital problems. They realized they married the wrong person & their true soulmate was the person they were chatting with online.
After months of secretly chatting, they decided to meet in person. They set a time and place and agreed to each carry a rose to identify themselves. When the husband arrived holding a rose, the wife felt betrayed and angry!
They each accused the other of being unfaithful, ending in a divorce filing.
Source: Unusually Interesting