I never read any replies in this thread so sorry if I'm repeating....
It depends on the intent. It seems friendly and you stated yourself you didnt intend to hook up. Most likely you're a dude just like me and most other dudes on the sicc, and subconsciously, whether you realize it yet or not, there is definitely some thoughts swirling around in your noggin about baggin that broad one last time.....Sounds like she's tryna sabotage your relationship and manipulate you into getting back together with her....Watch them women....scandalous.....
I found myself in a similar situation a couple years ago....Was with my girlfriend for about 4 years and definitely loved her. I had an ex texting me all the time tryna get together with me, and I thought about bagging her but would never do it.....Therefore there was no intent, and not cheating. But I suppose there were inappropriate thoughts, although I never would act on them even if nobody ever found out. Kinda like if a tree falls in the forest and nobody is around, does it make a noise?....kinda like that.....