I like that time Peter found out their house wasn't even located in America and so they seceded, naming their place Petoria. Then when Peter conquered Joe's pool the American Army cut off their power, and so they were using miner's caps to cook, and Peter kept looking at Lois' breasts, and Stewie came into the kitchen, looked at the knife, then Lois' back, then the knife, then Lois' back... then he started jumping for the knife. Lois was like "Stewie, is that you?" And so Stewie tried to run away but hit the counter and fell unconscious, then Peter left, but it looked like he turned back around and was looking at Lois' tits again, and she said "Stop looking at my breasts, Peter!" And Brian's voice said "Oh yeah, sorry."
Okay that wasn't funny when I had to explain it all long and drawn out like that, but that whole sequence was GOLD!