Felicity, you are not helping

The following conversation took place at a restaurant, after Felicity, Eva and I just finished a shopping marathon.
Eva: "Does the treadmill work?"
Me: "yeah." I say, as I dip my calamari in some tzatziki sauce, and pop it in my mouth.
Eva: "When was the last time you used it?"
Me: "Um...a couple weeks ago"
Eva: Grinning "So, you use it every six weeks or so?"
Me: (putting down my french fry) "What are you saying, Eva?"
Felicity: "Eva! Don't talk to an old lady about her weight!"