The house is Oprah’s, which she let her dad live in. At the end of the marriage, step mom no longer has a right to live there. I’m sure Oprah’s lawyers told her to get step-mom out of there before she could do something to make a claim to having a right to live there.
It's more complicated than that.
This woman owned her own home outright before she married Vernon Winfrey.
She moved into his house when they were married and moved her daughter from her previous marriage into her house.
When Vernon needed money to renovate his barbershop, she borrowed against her house to pay for it.
When Vernon's business failed, Oprah bought the note on Barbara Winfrey's house and foreclosed on it.
So she evicted Barbara from her own original home as well as her new marital home.