Awkwaaaaaard...!

The scene: a drizzly evening, leaving a restaurant in SF with one of my hula sisters.

I hear someone call out my name from across the street.

I look over and see a woman and a young-ish man. Can't tell who they are, though the woman slightly resembles a co-worker, though the young-ish man isn't her (very hot) husband.

Hula sister and I cross the street, as her car is that direction anyway, and I'm trying to figure out who this is, as it's not my co-worker.

We make awkward small talk for a minute or two, while I try to figure out how I know this woman. Luckily, hula sister picks up on the fact that I don't know this woman's name, though when she says it while introducing herself to hula sister, it doesn't help me. Neither does the young-ish man's name, nor the fact that her daughter works nearby.

Who on earth was that?? And what is happening to my memory??