You can't keep a good woman down. And as Brad Pitt is finding out, you can't keep a bad woman down either. Pitt has done a remarkable job clipping the wings of his new lover, and now the mother of his daughter Shiloh Nouvel, since they began their affair, but as we explain below, this new demure actress is not the real Jolie - and the cracks are beginning to show

Sexual differences
Before Brad, Jolie thought nothing of letting the world in on everything from her lesbian encounters to her sexual fetishes.

But since making her Mr & Mrs Smith role permanent, the only sound from the 30-year old beauty on the subject of her new man has been her lioness-like roaring during her throes of passion with Pitt in a Kenyan beach bungalow.

After months of stonewalling, the couple were forced to out themselves as an item when Jolie's growing bump made it unavoidable. That is how Pitt has wanted it and is getting it - for now.

'Angelina is naturally feisty and up-front but Brad has somehow managed to help her rein that in' says a close source of the Tomb Raider beauty. 'He's given her freedom in terms of her work but not with her personality. He's playing a dangerous game.'

Before meeting Pitt and playing her part in ending the seemingly idyllic coupling of the Troy hunk and former Friends beauty Jennifer Aniston, Jolie openly admitted to being unable and unwilling to keep her passions private.

'I am extremely outspoken about being in love,' she acknowledged of her then lover and husband Billy Bob Thornton. 'But I don't think there's anything wrong with that, or being sexual. I think all couples should be obsessed with each other, otherwise why get married?'

Unlike Thornton, Pitt is not the kind to sit by while his woman swings open the door to their bedroom antics.

Babies and parenthood
Fulfilling Pitt's dream of becoming a father has meant making a huge compromise of the actress's beliefs. 'I cannot ever have a biological child because I feel that would be one less child taken out of an orphanage and it would just haunt me,' Jolie insisted before falling for the broody Pitt.

'I know how many kids are out there and if I had one then there would be that one kid in an orphanage who didn't get adopted. I just can't do it. I think we're all meant to do certain things and I'm meant to find my family across the world amongst the kids who are already born.'

All that has now been thrown aside at the arrival of their first child Shiloh Nouvel - their first biological child. But already, new mum Angelina is showing signs of restlessness.

Angelina is making no secret of the fact that she wants to adopt yet another child, despite only having just given birth to their daughter Shiloh Nouvel. A fact that Brad is reportedly not happy about, concerned that their newborn baby will not get the attention she deserves should another child come on the scene so soon.

Brad's too available now?
'When it comes to men Angelina has always liked to be challenged,' says the source. 'She saw Brad as a challenge because he seemed so unavailable to her. She's always loved the danger surrounding unavailable men. She likes to break down barriers.'

Jolie has harboured such thoughts from a young age. 'My first sexual fantasy was Spock,' Jolie has revealed. 'He has that, 'You can't break through to me' thing, and 'You can't touch me' thing, and so he's a challenge.

'You think, 'Oh, I can get him.' I mean, there's got to be something underneath those ears and hair, and it's kinda perverted, I know, but I was just so in love with him.'

And despite their new 'parent status', Angelina is still not ready to commit. Brad has supposedly proposed to her on numerous occasions, but Jolie has told friends that she is addicted to her independence and continues to rebuff his offers.

Like father like daughter?
Even marriage is unlikely to rid Jolie of her dark side or her single-minded approach to life. The sanctimony of wedlock means nothing to the star since her disasters with Thornton and first husband Jonny Lee Miller.

'If the going gets tough, Angelina gets going - and she'll take her kids with her,' adds the source. 'It's something she learnt from her father (Jon Voigt). She'll never stay in a relationship that doesn't work because of what she went through in her marriages and what her parents went through when she was a child.'

'I don't feel sad about the loss of my father,' says Jolie of her long feud with Midnight Cowboy star Voigt. 'I feel sad about all the years that my mum felt the need to keep us together as a family, because maybe her life would have been easier if she could have detached herself from him.

'If you are being honest you shouldn't have to be around somebody who makes you uncomfortable.' Jolie says 'It's all a matter of self-knowledge and growth. I like who I am much more now. I feel very free and ready to live.' Can Brad keep her comfortable without smothering her? Who knows, but should it all go wrong, it will be Brad's turn for tears - Jolie, on the other hand, will undoubtedly walk away without a scratch.