Barney: Are you sure you're...
Robin: Well, no, not positive. I'm a week late. But I'm never late; it's a point of pride with me. I'm going to go see the doctor on Monday to find out for sure. Until then, not a word of this to anyone.
Barney: Not even Kevin? I mean, it's probably his. I've spent years training my boys to swim the other way.
Robin: Kevin and I haven't had sex yet. If I'm pregnant, you're the dad.
Barney: That's... wonderful!
Robin: Huh?
Barney: I'm gonna be a daddy!
[Robin passes out]