People want there to be a trick because a trick would make it easier to dismiss.
There usually is not one. She stopped explaining the dress. Stopped softening the smile. Stopped treating a second look like proof she had been accepted back into some club.
If someone younger gets ignored while she gets the glance, she does not rush to make it less awkward. She lets the room deal with its own math.
That is what men keep circling back to. She is not asking to be rescued from age or doubt or being overlooked. She looks like she already counted herself in, and everyone else is late.