I Have To Make A Choice...

After hearing what Gwen said, Lucifer realized what was going on, and he was glad that Gwen didn't know about his affairs with his mother, Jennifer, and Ashley. He felt relieved at the thought that his secret was still safe, but he also knew that he couldn't tell Gwen about it because if an on-screen kiss could make her angry like this, then she would never forgive him if she knew the truth.