S6E4: Stewie Kills Lois
PETER: I don't know, Bonnie. It's just a little weird.
Joe's a friend of mine.
BONNIE: No, it's okay. I promise you, it's okay.
PETER: I'm not sure.
JOE: It's okay, Peter.
Just remember, whatever you do, don't tell Chris I'm dating.
Peter, Lois has been dead for a whole year.
You're gonna have to tell him sometime.