The 41-year-old beauty - who has sons Alistair, nine, and Aiden, four, with the 'Maggie May' hitmaker - has revealed that she and her world-famous husband enjoy getting beauty treatments together.
She shared: ''We have facials together. He's a man's man with a very feminine side. He's a proud man, he takes care of how he dresses. He's a performer, a man who makes an effort.''
Meanwhile, Penny also described Rod as her ''eldest child''.
She told the Daily Mirror newspaper: ''I try and split my time between my eldest child - Rod - and my other two boys.
''Most men are still needy, especially when you have been in a long relationship before children arrive, and then children do take up a big part of your time and men feel they are left out a bit.
''So I make a very conscious effort to dedicate time - the two of us going out for dinner or having breakfast together. Just a moment amongst the madness, he still needs attention.''