Sam frowns a little, sits up, kisses her shoulder lightly.

"It's just - I don't know. Our deal was that we could mess around with anyone, wasn't it? But that we were the only ones who were serious. And ... I'm not sure what's going on with Cal. How serious it is, or how I feel about him. But probably more serious than what you and I agreed. I didn't mean it to be, but..."

His frown deepens. "And so I'm not sure what to do about it. But I'm still in love with you, and nothing's going to change that."