However, a judge has denied the "Warcraft" actress' request to limit the "Blurred Lines" singer's joint custody of their son, Julian, reported The Wrap.
In the legal filing, Patton claimed she is "concerned that Respondent (Thicke) is engaging in alcohol and drug use while Julian is in his custody. I am aware that Respondent has a history of drug use, which existed during our marriage."
She alleged that during the summer of 2014 when they separated, Thicke "looked ill. He was pale, clammy, and shaky. It was very uncharacteristic and I was worried about him."
"I then told Julian that I could not keep this secret anymore, and that I have to protect him," Patton said, according to the documents.
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"Principal Smith and Ms Mahajan called Department of Child and Family Services on January 4, 2017 to report their concerns about Respondent's abuse of Julian. DCFS came to my home on January 9, 2017 and interviewed Julian and me," the motion continued.
"They asked to interview Julian again, and they did in fact interview him again on January 11 , 2017. My understanding is that the DCFS investigation is still pending."
The latest filing stated that the current physical custody agreement gives Thicke overnights with his son every Thursday, Friday and Saturday.
After meeting on the Sunset Strip when Patton was 16 and Thicke was 14 in 1991, the couple was married in June 2005.
They announced their separation on February 24, 2014 after 21 years together amidst a high profile and tumultuous split.