Professor Highbury is talking to Rebecca in a lab. He is agitated, she is distressed.

[Professor] So how much does she know? Everything? Because this is a very serious situation! I am a well-respected man. It looks bad enough that I am having an affair with a student but I've got a wife! I'm married!

[Rebecca] She won't tell anyone. She's only using it as an excuse for me to do her work for her. She's not interested in the scandal, she's got enough of that in her own life. We can still be together Arthur…please…please don't overreact.

[Professor] How can you be sure? How can you be so sure she won't tell anyone? She hates you! You told me she hates you! It would only take one loose tongue in this place and the whole world will know about it! I can't believe I let this happen. I can't believe I let it come this far. No, she can't hold me to ransom anymore… she'll not blackmail Professor Highbury! It's going to stop!