Lily: I can't believe you told us Robin's secret.
Ted: How can I keep something like that to myself? And you begged me to tell you.
Lily: No I didn't.
[flashback to 30 seconds earlier:]
Lily: Please tell us, just tell us. I'm begging you. Tell us, tell us, tell us, please, please, please, please, please.
Ted: Fine, Robin's married.
Marshall: [laughs]
[Marshall slaps Barney]
[back:]
Lily: Yeah, well, you still shouldn't have told us. I mean, what kind of boyfriend are you?