Diondra's baby isn't much of a baby anymore. She's a young woman, and she looks a lot like Libby.
The girl's name is Crystal, and she pretty much knows everything about the incident. Her mom told her all she knows.
Crystal hasn't met Ben, her father, though.
Diondra tells Libby they still need to keep everything a secret. She's worried the police will think she was an accomplice.
Diondra invites Libby to stay for dinner—pot roast—so Libby does.
It's a typical dinner with the secret girlfriend of your mass-murdering, imprisoned brother.
Libby excuses herself to the bathroom, and, being a klepto, she steals some lipstick while she's in there.
Over a few glasses of wine, the girls talk about family memories.
Crystal asks Libby if she has any photo albums, but Libby admits that she has a difficult time looking at them.
Libby talks about all the boxes of stuff she has. "Half of it was Michelle's junk" (34.40), she says. According to Libby, Michelle wrote everything down in a diary, like that one time she got in a fight with her best friend over a boy they both liked.
Weirdly, Crystal knows the boy's name. Todd Delhunt.
Libby asks if Diondra knew Michelle, and she says not at all. We guess strangling a person to death doesn't count as actually knowing them.
Crystal excuses herself to pee.
As Libby realizes that Crystal must have somehow read her dead sister's diary, Crystal clocks Libby on the head with an antique clothes iron and knocks her out.