[flashback to a sleep-walking Robin walking past Ted and Karen making out in the apartment:]
Robin: Hey, Ted. Hey, Lily. Don't worry, I won't tell Marshall.
[another flashback:]
Karen: I'm gonna grab a beer, you want one? [laughs] Beer! I'll start decanting the Bordeaux.
[Karen reaches the kitchen where Robin is sprawled out on the floor in her pajamas eating food]