chunk: Underlying the family's dynamic is a tragedy that occurred years previously, which Kym retells at a Narcotics Anonymous meeting. As a teenager, Kym was responsible for the death of her younger brother Ethan, who was left in her care one day; driving home from a nearby park, an intoxicated Kym had lost control of the car, driving over a bridge and into a lake, where her brother drowned. The day before the wedding, as Rachel, Kym, and the other bridesmaids are getting their hair done, Kym is approached by a man whom she knew from an earlier stint in rehab. He thanks her for the strength she gave him through a story about having been molested by an uncle and having cared for her sister, who was anorexic. Rachel, hearing this, storms out of the hair salon. The story turns out to be a lie, an apparent attempt by Kym to evade responsibility for her addiction.