Mr. and Mrs. Fremont

Mr. and Mrs. Fremont are the parents of a child used as a temporary vessel by Lilith.

Season 3
The demon Lilith arrives in New Harmony, Indiana and possesses the Fremont child and kills the babysitter. She then forces the Fremonts to do her bidding and treat her like their daughter.

Mr. and Mrs. Fremont are terrified, but aren't willing to take action out of fear and concern for their daughter. Mrs. Fremont is forced to bake a cake while Lilith takes Mr. Fremont outside to play on the swing.

Later, the family gather at the dining table to celebrate Lilith's birthday again. As Mrs. Fremont cuts the cake, Lilith confronts Pot on calling for help. Lilith asks if Mr. and Mrs. Fremont were aware of this, and they both say they weren't.

Lilith then snaps Pot's neck, causing Mrs. Fremont to scream in horror, but she quickly covers her mouth, as Lilith reminds her that screaming "makes me mad". Afterwards, they resume having the cake.

Inside the child's bedroom, Mrs. Fremont reads a story to Lilith. When the story ends, Lilith orders her to read it again, despite Mrs. Fremont having read it 26 times. Lilith gets slightly angry until Mrs. Fremont complies.

Mr. Fremont is meanwhile downstairs, and gets caught by Dean Winchester. Dean tells him they're here to help, and Sam asks where his daughter is. They instruct Mr. Fremont to go to the basement and put a line of salt behind him, but Mr. Fremont refuses to do so without his wife. Dean responds by knocking him out and carrying him there himself.

Sam and Ruby go upstairs and Sam enters the bedroom. The child is asleep on Mrs. Fremont, who pleads to Sam to just "Do it", telling him to hurry. Just as Sam is about to stab the child, the child wakes up and screams at the sight of him. Dean prevents Sam from stabbing her, telling him that Lilith is gone.

Mrs. Fremont then comforts her crying daughter and goes to the basement, guided by Dean.

Appearances
Season 3
 * No Rest for the Wicked

Trivia

 * Jonathan Potts, who portrayed Mr. Fremont, also portrays Arthur in season 11 episode Into the Mystic.