The War at Home S01E03 - High Crimes

Dave is sure that the reason Hillary has been so nice to him lately is because she is having sex. But when Mike does some spying and Dave finds out that he's wrong, he's then sure it's because she's been smoking pot - his pot, when his stash goes missing. He confronts her and when she denies it he accidentally lets her know that he has a stash, which he says he's holding for Vicky's mother, Betty, to use for medicinal purposes