Mark -- if W wants a spat, and you don't, she's going to try to force one. If you respond, you're playing HER game. So do a Rod Laver -- hit it back, past her. Totally change the subject: "Hey, did you see that Pompey are getting relegated?" or something of the sort (perish the thought!). She'll get that quizzical look and say something to the effect of, "What are you talking about? Did you hear what I said?" And you reply with a lob -- "Yes, I heard it. Hey, did I tell you that John from down the pub tripped and broke his ankle?" Eventually she'll tire from trying to chase down the argument ball, and by the time she catches up to it, the moment will have passed. And you'll be looking strong and confident and she'll be sitting there with that Benny Hill look on her face -- Wha' Happant?