Kristen's alleged infidelity came just months after Robert gave an interview to Italian Vanity Fair magazine saying that he has 'never understood' people who cheat.
He said: 'There is one thing I've never understood: Why people cheat. My parents met when my mom was 17 and my father 25, they are still together, and seem very happy.
'I grew up believing that you can be together all of your life.'
The pair made their latest public appearance when they took the stage together at the Teen Choice Awards on Sunday – just two days before the news broke.
