Robert was your co-actor, so of course you both are married to someone loved. But because you always act with him, some how you grow feelings to each other.

So you and Robert had one night stand despite being married. By the morning, he wake up. He didn't want to leave.

"I... I'm sorry... I love you, but it's... I can't.."

Robert held your hand and cry.

(There will be divorce from him to his wife)