Of course, Becky returned the favor in "Stressed to Kill". Becky had had anger bubbling for weeks during Darlene's depression, since she was picking up all the slack in terms of chores and getting nothing while Darlene laid around on the couch and was being fawned over. When Becky helped Darlene with a history paper and only got yelled at for her trouble, she finally let Darlene have it.
Becky: You know, I don't believe you Darlene. I help you out with your paper and you get me nailed for it.
Darlene: Look, I apologized for that yesterday. Besides, I didn't ask for your help. You just felt sorry for me and I don't need your damn pity.
Becky: Are you kidding? You're begging for it. "Oh, high school is too hard. My friends don't like me. Nobody understands me." Well, then do something about it, you little wimp!
Darlene: Shut up Becky. You don't know what you're talking about.
Becky: Of course not, 'cause you're so complex, you're so deep. Well, that's crap. You're just a whiny little basket case who's milking this depression thing for all it's worth. So here it is, four in the afternoon and you get to do exactly what you want, well, way to go. Now excuse me, but I got a zillion chores to do or Mom and Dad are gonna kick my butt.