S3E7: Lethal Weapons
Happy 50th birthday, Lois.
It's obvious that your son is learning this behavior from someone.
i-I know who's responsible for Stewie's behavior.
But if I told you who it was, Lois would beat the crap out of me.
Now, just a minute!
The whole reason I started fighting is because of you!
I felt weak! Y-You never listen to me!