Can You Believe She Said That

So I've been know to run. About 10 miles a day give or take. I've always thought that was pretty good. Well, we just had a new neighbor move in a few days ago. I finally got to meet her today. She's this very sweet older lady with thick all white hair whose in her 70's. I introduce myself and she says"Oh you're the one who likes to run" (small town, nothing's private). Apparently she likes to run marathons, outside. I say yeah but I like to run on a treadmill inside. Her response is "Yeah, you're a lightweight". I do not want to play keeping up with the Jones with her.