Following directly from the previous arc, the storyline opens with Penny trying to determine what's got Aggie so upset. Aggie blurts out that it has something to do with Karen. Unable to understand her speech through the sobbing, Penny, based on the little she knows about Aggie, assumes that Karen taunted her about her deceased mother the same way she'd once contemplated doing. However, when she figures out Aggie's actually upset over Karen having "snatched away" Marshall, she claims boys aren't worth getting upset over. Miffed, Aggie snaps back into snark mode and the two are enemies once again. But now Aggie, having accomplished her initial mission to blow off steam, through antagonizing Penny, feels better.