What would you do if you got a call from your partners flatmate to let you know they are in bed with someone else cheating on you. Maybe you would text them to finish them there and then. Maybe you would arrange to meet to confront them about what they had done.
This guy decided to take things one step further. He reached for his phone, went to her house and burst in on her in the act. He caught the whole thing on camera and then posted it online for all to see.
There really is no excuse for cheating!