I now know I'm not winning this verbal back and forth, so I leave it be and pick up the kettle to start making the tea myself, if you can not defeat your enemy, do your best to deprive them of victory. "Oh, hmmm, thank you." Or just mildly annoy them however you can. "Anyway, enough of all that, how has your day been so far?" Her tone changes again to a relaxed but somewhat more serious tone.