She knows
In “Knots Landing’s” second-season episode “Kristin,” Kristin and Valene (Mary Crosby, Joan Van Ark) argue in the Ewings’ guest bedroom.
VAL: If you’ve got something to say, Kristin, I think you better say it.
KRISTIN: [Looks away, begins tearing up] I’m pregnant. [Sits in a chair]
VAL: Pregnant? [Sits on the edge of the bed]
KRISTIN: I didn’t wanna tell anybody. I thought it would be easier for the baby if I kept it a secret. I hoped to find somebody who would be a father to my baby.
VAL: Do you know who the father is?
Kristin is silent. Val moves off the bed and kneels in front of the chair.
VAL: Do you love him?
KRISTIN: I don’t know.
VAL: Darling, why didn’t you tell me this before?
KRISTIN: I was afraid that if I told you, you wouldn’t help me.
VAL: Oh, no, that is not true.
KRISTIN: You wouldn’t have let me in.
VAL: Oh, no, Kristin. You’re wrong. I would have. I know exactly how you feel right now.
KRISTIN: No you don’t. Nobody does.
Val lays her head in Kristin’s lap.
[...] Ginger Ward (James Hougton, Kim Lankford). Soon, Valene (Joan Van Ark) was confronting Kristin, who confessed she was pregnant and afraid for her future. It was a rare and moving glimpse into Kristin’s soul. [...]