In the flashback where young Valene is listening to her parents argue, she is holding a Heather Hobbie doll which had only come out in the mid 1970s, long after Valene was a child.
Valene is unaware that Laura's mother died when she was twelve. However, Laura told her as much in The Lie (1980).
The shadow of a boom mic is visible in the upper right hand corner of the screen during Valene and Laura's conversation in the former's house.