"When I was a teenager, I battled some severe depression," she tells Dr. Monica Shahbaznia. "I attempted suicide a couple times. I went to a mental institution ... drugs, overdosing, slitting wrists, all that stuff."
The 30-year-old TV personality states the reason for her behavior was due to not getting the love and support she yearned for from her distant mother.
"I was left on my own," she says, holding back tears. "I was a young f------ girl. All I wanted was for my mom to say, 'I love you, and I'm here for you.' I never got that."
Sadly, Wilkinson isn't the only former Playboy model that has once considered suicide. Her Girls Next Door costar, Holly Madison, opened up about her dark moments in her tell-all memoir Down the Rabbit Hole: Curious Adventures and Cautionary Tales of a Former Playboy Bunny.
"Life inside the notorious Mansion wasn't a dream at all -- and quickly became [Holly’s] nightmare," a press release for the novel stated. "After losing her identity, her sense of self-worth, and her hope for the future, Holly found herself sitting alone in a bathtub contemplating suicide."
Despite the fact these two have been through similar situations, their relationship has taken an ugly turn. In another promo for Wilkinson's show, she slams Madison for writing "disgusting" lies about Hugh Hefner in the memoir.
"What Holly is saying is extremely false," the model says in the clip. "I'm like, 'Where did this s--t come from?'"
Hefner has denied Madison's accusations, saying the 35-year-old, who broke up with him in 2008 after five years together, rewrote history.
"Over the course of my life, I've had more than my fair share of romantic relationships with wonderful women. Many moved on to live happy, healthy and productive lives, and I’m pleased to say remain dear friends today," the 89-year-old told ET in a statement. "Sadly, there are a few who have chosen to rewrite history in an attempt to stay in the spotlight. I guess, as the old saying goes: You can’t win 'em all!"
Watch the video below to hear more of Wilkinson's thoughts on Madison's book.