It’s all coming back to me now

In which I bask in the art of the “Real Housewives” flashback.

When people say “know your history,” they’re almost never referring to the Real Housewives franchise. Except when I say it. When I say it, yes, nine times out of ten that’s what I mean. As we wrap on the current seasons of the long-running The Real Housewives of Beverly Hills and The Real Housewives of New York City — the former has two more reunion epi…