Sharon Osbourne Publicly Slams Brother, Claims He Tried to Profit From Jack's Multiple Sclerosis Diagnosis

David Arden, who also has MS, claims he's "prepared to make peace with [Sharon] for the sake of Jack"

Sharon Osbourne is a woman not afraid to speak her mind!

She did just that in an open letter to her brother David Arden posted Wednesday, Dec. 4, slamming her estranged relative for attempting to cash in on Jack Osbourne's Multiple Sclerosis diagnosis.

According to Sharon, 61, her brother, 62, has been trying "to make money off our dysfunctional relationship" since 2007, citing stories allegedly sold to The News of the World and the Sun. "Now you appear again," she states, "having sold a two-part story to the Daily Mirror, claiming you want to help Jack with his MS."

"That's as low as it gets, making money off my son's MS," she writes. "Jack was diagnosed in 2012, where have you been the last 18 months? You know how to reach me. You know how to reach the Osbournes."

David, who suffers from MS himself, tells the Mirror that he's "the only other person in the family" with the disease. "I know when I was first diagnosed I wanted to speak to fellow MS sufferers," he says, speculating, "I'm sure Jack feels the same."

But Sharon points out Jack, 28, has a strong support system. "He is a married man with a daughter and a loving family," she writes, reiterating to her brother that he was "only in his life for a handful of years, [Jack] doesn't know you."

The Talk host runs through a laundry list of ways she financially helped her brother and his family, but has "realized after all these years that I cannot buy your respect or love."

She also responded to David stating that he "sick and tired of Sharon bad-mouthing our parents," citing multiple examples of how their father, late music producer Ron Arden, used her as a "financial shield" in her younger years and she "spent years paying off his bills because they were in my name."

David says his sister's criticism "has got to stop," but claims he's "prepared to make peace with her for the sake of Jack."

Sharon makes it clear she is not interested in reconciling the relationship, but she does express to David, "I really do wish you and your family well."