I just finished watching this episode (I do not get HBO so the DVD collection is the first time I ever watch the new episodes) and I did not understand the ending. After a soccer mom battle between Janice and some other woman, Janice took anger management classes to cope with her problem. She has come to terms with this problem (or as so it seems; not watching the last few episodes of the season) and her family seems content with it. Tony is over their house and along with Bobby, they are having dinner. Tony is making it very open that he is appempting to upset Janice by revealing to Bobby's children at the table about her past. He continues to prode Janice with digs to get her angered and at the end, is screaming obscenities at him and appempting to stab him with a fork or knife. He seems like that his mission (which was complete) was to upset Janice and break her out of her ability to manage her anger. You can tell by Tony's reaction to the telemarketing incident and the following events that he is not at ease with Janices ability to accept and control her emotions. Maybe he is resentful or even jealous of this act. My question to you is that why was Tony so aggravated at Janice and the end of this episode?