Polly Draper wrote, directed and co-stars, playing the mother to sibling rivals Alex Wolff and Nat Wolff in this love triangle — one brother steals the other’s ballerina girlfriend (Paulina Singer) — set against the backdrop of a beloved, aged dog who is about to be “put down” as we euphemistically say.

There’s been a lot of that in films these past couple of months, I must say, and as I have shared my life with a beloved “Stella” myself, this one could be a hard sell — and not just because we’re over the Wolff quota.

“Stella’s Last Weekend” opens Oct. 12.