In an exclusive interview with Life & Style, Holly Madison – Hugh Hefner’s ex and writer of the new tell-all memoir, Down the Rabbit Hole: Curious Adventures and Cautionary Tales of a Former Playboy Bunny – has a message for Hef’s current wife, 29-year-old Crystal Harris.

“You are definitely getting in over your head,” Holly warns Crystal. “I thought being a live-in girlfriend would be a light, fun thing, but it was a lot heavier.”

hugh hefner

Holly tells Life & Style about how controlling Hef was. “He made me give up my last shred of independence. We weren’t allowed to have outside jobs, and it was so catty among all the girls,” she shares.

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“Crystal’s in the same situation I was, which is really hard for someone in her 20s,” Holly explains. “It’s way more intense than you could imagine.”

For more details, pick up the latest issue of Life & Style, on newsstands now!