Zumba Joy

She's clear-eyed and blonde, a starlet's face and a body that a dancer of any age would love to have, and on Mondays she joins us for Zumba.  She's lived enough years to have great-grandchildren (she tells us this; we don't believe her; she seems, to us, infinitely young) and you can find her now, before the salsa and hip hop starts, reading a reliably fine book on her Kindle.  I dance beside her and she laughs at me, reminding me, however politely, that I'm just a nudge to the other side of ...