Crystal Hefner says her marriage to controversial Playboy mogul Hugh Hefner came with the “price” of enduring a huge “power imbalance”. The former Playmate, 37, was 21 when she was invited to stay at the Playboy Mansion in October 2008, and a few months later she and Hugh entered a relationship – before Crystal became the pornographer’s third wife when they tied the knot in 2012. They stayed married until Hugh’s death at the age of 91 in 2017 from sepsis, and she has now opened up about the problems in their relationship ahead of the release of her memoir ‘Only Say Good Things: Surviving Playb…