Was Penny Fleck Lobotomized?

These documents relate that Penny had narcissistic personality disorder and endured a lobotomy, as well as that Arthur was adopted and tortured as a child by his unnamed stepfather. Presented with the news that his mother has deceived and abused him, Arthur kills her.

Did Penny really adopt Arthur?

Penny Fleck is was the adoptive mother of Arthur Fleck, a mentally unstable failed comedian who would later call himself the Joker. Much like her son, Penny suffered from an unspecified mentally illness. ... Penny was portrayed by Frances Conroy as an adult, while her younger self was portrayed by Hannah Gross.

What did Penny Fleck do to Arthur?

Much like her son, Penny is a mentally ill woman who was responsible for letting her former boyfriend abuse Arthur in his childhood and was temporarily sent to the Arkham State Hospital for her claims of having an affair with Thomas Wayne.