''It is nearly three days since my father walked onto his back porch and bit down on a loaded gun. But it feels like an eternity since then.'' Kate, already unmoored by the implosion of her career and marriage, finds herself spinning even further out of control as she joins her brother and sister to plan the funeral. As they crowd into their dad's dreary Atlanta condo with a bevy of ex-wives and half siblings, decades' worth of old grudges and bitternesses bubble through their conversations. It's an indelible portrait of a family, messy and raw. Prickly Kate isn't a particularly sympathetic character — but she feels like a real one. B+