"...Uh, I haven't."

I lie, not wanting this to become more. Caleb's eyes widen in realization. "Oh! I'm sorry, I shouldn't have suggested that! Please forgive me?" He begs, seeming to scoot his chair closer to the screen. "Yeah, you don't need to apologize, it's all right. So, uh... what were we talking about before that?" I ask quietly, and the rest of our call consists of me pretending I know what he's talking about so I can help him review his course...