S4E14: Brother From the Same Planet
Where have you been?
Playing with Milhouse.
No, you haven't! You've been out gallivanting around...
with that floozy of a bigger brother of yours!
Haven't you? Haven't you?
Look at me!
Dad, it just kind of happened.
You're taking this too hard.
How would you like me to take it? "Go ahead, Bart. Have your fun.