This is a misconception that seems to have spread online.
* Heath Ledger's parents: Heath Ledger was the son of Kim Ledger and Sally Bell. He did not have a stepfather.
* Gloria Steinem's relationships: Gloria Steinem has been married twice, but neither of her husbands were related to Heath Ledger. She was first married to David Bale (father of Christian Bale) and later to Martin Evans.
It's possible that this rumor may have originated from a misinterpretation or misunderstanding of information related to the actors and their families.