Amber Heard said Johnny Depp "introduced" his daughter, Lily-Rose, to weed when she was 14 years old.
Heard also testified that she took Lily-Rose out for a birthday dinner when Depp was too sick.
Representatives for Lily-Rose Depp did not immediately respond to Insider's request for comment Thursday.
Heard said she realized it wasn't her place to make parental decisions about Depp's kids, but she "just felt protective."
Heard also spoke about taking Lily-Rose out for dinner on her 15th birthday, after witnessing a Depp go on a bender.
At the time, Heard was shooting "The Adderall Diaries," a movie with James Franco, in New York.
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