You could have given her some Cok-a-mammey story about prepping to test the urea content in lawns curbside that you have treated to guard against damage from the neighborhood dawgs.
Proceeded to dig yourself deeper by explaining that it was simply part of a time trial to test this "product". Afterall her property had not been treated as her neighbors had been and you needed similar test subjects in various neighborhoods.
Then you could have hooked the bait and told her that if the results were favorable, when you offer this plan to clients as an "add-on" to your Lawn Programs next year she can get her first year free for being a "Test Subject".
Nahhh, I didnt think they'd buy it out West either -LOL!!!
Well its good to hear that something positive came from the truth.