She Took My Hand For a Moment; What Does This Mean?

touche the sun

hold out your hand to your wife

I've had a friendly relationship with a neighbor down the street for about a year. It started when I saw her walking her dog and I approached to ask about the dog, being a dog rescue volunteer. Now, when I see her coming down the block with the dog, I leave the house and we usually wind up talking on my steps. We have a very good rapport; lots of laughing, etc. She is a widow and I (get ready for the fly in the ointment) am married. She knows I'm married. She's met my wife. My wife knows that if anyone on the block owns a dog, chances are I know them. My wife works; I am retired and volunteer at an animal shelter. She has asked why she rarely sees me and my wife together. I told her that we're not very close; basically living separate lives under one roof. Anyway, nothing further along those lines has been said (I made that comment about a month ago). This evening, after our little conversation on my steps, my neighbor reached out her hand to me as she left and I took it for a moment. That was all there was to that. Was it just a friendly gesture, or does this physical contact mean anything?