Zefram: You're gonna regret this tomorrow. Lily: One of the things you should've learned about me by now... is that I don't have regrets.
Lily and Zefram leaving the bar, having had a few too much to drink at a bar. Lily comments tells Zefram he is going to regret this tomorrow. To which Zefram replies that she should have have learned by now that he has no regrets.