She was taken to hospital in July and later posted on social media to thank fans for their support.
He admitted to providing Demi with prescription drugs, but at the same time, he said that they were not pharmaceutical.
The site claims that the "Tell Me You Love Me" singer has been transferred from a rehabilitation center on the East Coast to a different location, where she's been for over a month in a group program. "Dallas, [other daughter] Madison and I jumped out of the auto and ran into the emergency room to be by her side and she just didn't look good at all", said De La Garza.
Demi Lovato's mother has broken her silence on the star's apparent drug overdose two months ago. "Right now, Wilmer is just trying to be there for Demi and be a solid friend to her". I didn't know what to say, it was just something that I never, ever expected to hear as a parent, about any of my kids. I think my heart is always with Wilmer, I think it was with Wilmer, I think it is with Wilmer, I think it will be.
Demi Lovato happy and healthy in recovery, says mother
During an appearance on Newsmax TV in America she said she was "in shock" following the news and went straight to the hospital in Los Angeles where Demi was being treated.
"She's working very hard on bettering herself and staying on the right path", the source says.
Watch the full interview with Dianna de la Garza below.
"We just didn't know for two days if she was going to make it or not", she said.
After hearing Demi's response, the 56-year-old says she made a decision to never allow herself to think "that things weren't going to be okay" again.