The Playboy magazine founder passed away in September at the age of 91 after suffering a cardiac arrest, and his 31-year-old spouse says not a day goes by she doesn't think about him.
She said: ''I miss him every day. He taught me a lot. He taught me love. He taught me kindness.
''He was so kind to everybody, so welcoming to everybody into his home, it didn't matter who you were.''
Since his death, the buxom blonde - who has kept busy with charity work around the world - says she doesn't feel the need to be ''dolled up'' in lots of make-up because that is something she did just to be part of the Playboy image.
She told Australia's Daily Telegraph: ''I've never been the heel and dress and full make-up, I've never been that kind of person.
''Maybe I felt like I had to be in the role I was in, being Playmate or being a part of Playboy, that I had to be dolled up.
''I think now I am more myself, which is the more down-to-earth, minimal makeup, that is where I feel the most comfortable.''
Crystal was believed to be a ''pillar of strength'' in Hefner's final years, and stayed by his side through his ''declining years''.
A source said previously: ''Crystal surprised the hell out of a lot of people when she stood by Hef's side in his declining years as he got older and became more frail. They actually called Crystal a pillar of strength.''
According to gossip website TMZ.com, Crystal - who married Hugh in 2012 - accompanied her husband to his doctor's appointments, and even set up game and movie nights to keep his spirits up.
She also reportedly stayed by his bed side after he was placed on bed rest, which is believed to have come as a pleasant surprise to his family - including children Christie, 65, David, 62, Marston, 27, and Cooper, 26 - who are said to have been concerned about her motives when she wed the wealthy businessman.
The insider added: ''The family initially was concerned that as Hef got older she wouldn't be there to support him, but she flipped the script with her attentiveness, and we're told the family's immensely grateful for her vigilance.''
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