"The Good Neighbor," by Jeff Abbott, in Austin Noir, edited by Hopeton Hay, Scott Montgomery, and Molly Odintz, Akashic Books, 2023.
I received a copy of this book from the publisher.
We're in suburbia where good local schools make a house worth keeping forever, and neighbors have known each other for decades.
Bill dies of a heart attack. leaving behind his much-younger trophy wife Dierdre and resentful college-age son Peyton. This is not a happy home.
Viv, their neighbor, also a widow, loves the whole family. The conflict she sees across the cul-de-sac makes her very uncomfortable. Then she discovers something that makes her suspicious and even more uncomfortable.
The suspense builds nicely as Viv tries to figure out what she can and should do.