Concerns about Tessa Hadley story in current NYer

I've generally been a fan of Tessa Hadley's short stories that have been appearing in the New Yorker for probably 10 years - her more recent stories in particular; although her current piece of short fiction in the NYer shows some of her strengths in writing - beautiful topical description, sharp delineation of character - in some ways this piece of writing disappoints. The "story" gets off to a good start, as she focuses on a character, Serena, walking through a neglected English garden (this passage replete w/ names of about a thousand flowers, one of the many "very English" touches we find throughout TH's fiction, for better or worse) and then she surprises us: I'm sure most readers will think that Serena is a young girl but it turns out shes the youngest of 3 sisters, all of them in their 50s or so. Neat surprise Then TH goes on to develop each of the characters, who have come together to tend to the neglected older house and to visit their mother in a nursing home or hospice. This is a Chekhovian set-up, and TH builds tension into the story in a # of ways - the arrival of a man on the scene, who offers to do some household maintenance, and who later seems to stalk youngest daughter Serena; the discovery in the attic of some records the women kept in their girlhoods when they'd formed The Bunty Club (which is the title of the story) pledged to doing bad things and revolting against their strict father (they find a gold ring among the records that they believe they must have stolen, though none can remember). Great - but then the women receive word that their mother has died and the story just stops. Huh? TH had set up a # of tension points and delivers on none of them: In particular, couldn't there be a bigger payoff on the "club," something really nasty the women did to one another or to someone else (Alice Munro would know how to make good on these story elements). So I have to wonder whether this is an excerpt or a standlone; of the former, it's poorly edited; if the latter, it's a missed opportunity.