When Dave notices how nice Hillary has been to him recently, he is certain it's because she's having sex with someone. However, Mike (who always spies on her anyway) convinces Dave that he is wrong. Dave then jumps to the conclusion that she's smoking pot when he notices his stash has gone missing. As he's confronting her about it, though, he accidentally lets it slip that the missing stash is his. He then lies and tells her that it's not really his - it belongs to Vicky's mother, Betty, who uses it for medicinal purposes. Mike overhears this, and buys some dope from the local playground to give to Grandma Betty, which he does, telling her it is from his dad. Vicky eventually finds the dope, and smokes it to help her cope with a boring book club meeting. Grandma Betty, meanwhile, has a party of her own.