"But Rachel also has another hobby, one that makes her a bit different from the other moms in her Texas suburb—not that she talks about it with them. Once a month or so, after she and her husband put the kids to bed, Rachel texts her in-laws—who live just down the street—to make sure they’re home and available in the event of an emergency.
"And then, Rachel takes a generous dose of magic mushrooms, or sometimes MDMA, and—there’s really no other way to say this— spends the next several hours tripping balls."
Why don't they take the child to the in-laws? Waiting for an emergency is too late.
Even if they didn't, it is a child and not a ticking time bomb.
Children require and deserve a safe and predictable environment populated by responsible adults who can attend to their needs and adequately respond in an emergency.