12/10/2012 09:27 am ET

Ariel Winter Abuse Case: Actress' Sister Deposed, Grilled About Drug Use By Mother's Lawyer (REPORT)

Ariel Winter's sister -- and current guardian -- sat down for a deposition with her mother's attorneys, and was hammered with questions about drug use ... TMZ has learned ... but the questions for the most part netted the history of your average Joan.

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