I'm very sorry to hear of your loss. I grew up surrounded by little old neighbor ladies, and they always seemed like they were the same as family.

If you were specifically requested to play a tune or 2, I would say go for it.

The fine lady liked hearing you play, not necessarily pipers in general and it sounds like she got a lot of enjoyment in life out of hearing you.

Play for her memory, and you'll remember it fondly for the rest of your years.

Always, -Steve