Every ENM situation I've been party to involved pretty up-front and straight-forward setting of status and intentions. I (M) met a woman in an extended social setting on vacation this weekend. No ring and I had assumed she was single because we immediately connected and started flirting all weekend. As things are getting hotter and it's obvious things might turn sexual, she gives me her social media and I find out she's ENM.

There are a ton of ostensibly germaine details I'm leaving out but I'm curious: if one is in an ENM situation, should they flirt and proceed as though they were otherwise single and, if so, at what point should they disclose and negotiate? In other words, at what point does it potentially turn to leading someone on?