What Just Happened?

I arrived at the dog park about 9 this morning.  The usual people and dogs were already there.  BUT!  There was a new person, I don't remember seeing her before.  She looked about our age.  She just stood there looking at the other people but did not say anything.  She looked like she might have a leg or hip disorder, so kind of limped and walked at an angle.

She was standing.  I offered she could have my seat.  She smiled and should her head, like she was saying, "Thanks but no thanks."

Joe was trying to think who sung a certain song.  He repeated the song words and she interrupted him and told him sung it.

Five or ten minutes, a gray headed man who looked to be either her son or husband walked in from the parking lot and took her hand to lead her out.

They left.what