In the hall, she asks Chuck to wait while she grabs something. When she's gone, he flashes on a photo of a young boy with a woman. It's Hartley, meaning she obviously knows the guy. She comes back down then with a shotgun and points it at Chuck. She asks what he wants with her son, and blames the government for taking him away. She says he never should have been sent undercover, since he was a scientist. She says that the CIA disavowed him when no one could bring him in, and no one lifted a finger. Chuck says that someone did: His dad spent his whole career trying to find Hartley. She immediately realizes Chuck's father is Stephen Bartowski, and puts down the shotgun. Chuck asks if she knew his dad, and she says of course; he and Hartley were close. She asks, hopefully, if Chuck's going to fix her son.
Sexy lady, Riley, and the gang show up outside. They see the vehicle Chuck, Sarah, and Casey drove and realize someone beat them here. They start shooting up the place. Casey thinks they were followed, but Hartley's mom says they're not following them; they're here for the same thing Team Bartowski came for: Hartley's spy will. She tosses a key to Sarah to go get it from a vault in the cellar while she and Casey keep shooting from the window (but only after she gets a real gun instead of his government-issued "pea shooter"). Casey watches in amazement as she masterfully shoots the machine gun. Downstairs, Chuck and Sarah find the spy will just as Hartley's mom runs out of bullets. Casey asks now what, and she starts placing explosives and grenades everywhere. Casey says she's like the mother he never had. She "awww"s and tells him he's charming. They head outside and hide while Riley's people all head inside (except for Riley, of course). When they're all in. Hartley's mom pulls the yarn she's tied to all the grenades, and the whole house blows up. She laughs like a maniac and sends them away with the spy will. Casey loves this woman.