1. You can omit the article if you wish, especially if it's a long list.
2. Irony is when you say one thing but you really mean the opposite. For example, it's pouring with rain and you say: "Lovely weather today."
What you have there is sarcasm. Often sarcasm is ironic, but it doesn't have to be. Sarcasm is either a very exaggerated form of irony, or a comment designed to be hurtful. The wife might say: "I suppose you're going to tell me you were working late at the office last night." If she uses the correct intonation, it would be sarcastic. It would mean: "Don't think you can fool me with your usual lie."
The "of course" isn't necessary for either irony or sarcasm, although it's often used for irony and sarcasm.