The Duality of Rosemary Peony Walten (TWF 5)

On one hand, Rosemary is a grieving mother, who lost her children to a drunk-driving accident and was widowed after her husband's disappearance.

But on the other, she's a mentally unstable woman, who refuses to get help from anybody and keeps her only living child with her, even though she's unable to provide a stable living environment for her. She even lashes out on Sophie, after all she wanted was a happy family again.
Rosemary became even worse afterwards, trying to drown herself and almost choking a cop to death.

The cops had to lock Rosemary into a cell, so they could send Sophie to her aunt Laura, because they probably knew Rosemary wouldn't let them take Sophie away from her that easily.

She's a woman, broken by grief and turned into a shell of her former self. And this is what I like about Rosemary...

She is a well-written character and through "My Soul" (secret video), we saw how Rosemary spiraled into insanity. Rosemary used to be happy, but one fatal accident caused everything to go downhill for her.

When Rosemary got to Bon's Burgers and talked to "Bon", she showed how vulnerable she was to him. A sheep showing her weakness to big bad wolf, pretending to want to fix her.

The paintings we saw were also a great representation of her insanity, with her wanting to kill Felix for what he has done to her children. Even showing herself as "The Mother Sheep" killing Felix as "The Big Wolf".