Fifi was the oldest, so can't have been the girls nanny.
From what I’ve heard, Paula was obsessed with Michael for a long time, and it’s also true that she interviewed him (in a very flirty manner) when he appeared either on The Tube, or The Old Grey Whistle Test (can’t remember which) So they knew each other for a few years before getting together. But, I don’t for one second believe that Fifi, Peaches and Pixie are not Paula’s and Bob’s. Mainly because I’m old enough to remember when Paula was pregnant with Fifi, and this was when Paula presented The Tube, so it was quite a big thing back then to see a pregnant woman presenting a tv show (Paula was quite the trailblazer). Paula also wrote a book about motherhood, and at that time, was madly in love with Bob. Paula also said that Bob was aware about her crush on Michael Hutchence, because Paula had stuck a photo of Michael on their fridge.
When Paula and Michael got together, he was in a serious relationship with Helena Christenson, and they were widely believed to have secretly got engaged. Bob was devastated when Paula left him, he tried to get Bono (who was a good friend of both Bob and Michael) to act as an intermediary, and when Paula decided that she was never coming back, Bob put into place a plan to completely blacken Paula’s name. Bob really was relentless, and the British media loved it, here was Saint Bob, a man who was loved by millions over Band Aid and Live Aid, and Paula was nothing more than a cheap tart, who had “dared” to leave a national treasure...After Michael died (was it suicide? Or as Paula said, a sex act that had simply gone wrong) She was utterly convinced that there was no way that Michael would ever leave her or their baby.
It’s worth noting as well, that on the night that he died, Michael had a couple of friends over to his hotel suite, one of them was his ex-girlfriend, and her boyfriend. They said that Michael spoke to Paula on the phone, and was devastated to learn that Bob would not allow Fifi, Peaches and Pixie to travel with Paula and baby TigerLilly to Australia to meet up with him. Michael then got angry, and phoned Bob, and there was a lot of shouting and pleading from Michael, but Bob wasn’t going to budge. Do I think that Michael killed himself over this situation with Bob and the kids? We all know that Michael was suffering from depression over the accident where he fell and smashed his head, and we also know, that on the night he died, he had been heavily drinking as well as taking drugs. But personally, whatever Michael did that night, he didn’t purposely take his own life. I watched a 60 minutes Australian documentary on Paula, this was just after Michael died, and Paula had moved with baby Tiger, to Hastings. It’s actually a really good documentary if anyone fancies watching it. And Paula looked good, was great with the baby, but was obviously using heroin to self medicate. There was a famous line from Paula which she said that when they first had sex, Michael had done 5 things to her that were “illegal”.... If I can find the 60 mins interview I’ll try and post it here. It’s well worth watching, if only to see just how Paula behaves when she’s lost the love of her life...
All 5 of us hated him with a passion after that !! Reading his name gave me the rage after all these years !! 
. I do think that the 'earth mother' thing was a huge lie she was trying to cultivate decades before the 'influencer' generation. And it's obvious the nanny was the one doing the heavy lifting when it came to those girls. Fifi has been pretty scathing about Paula and has more or less admitted they weren't close. I think Paula was utterly obsessed with men and making herself as sexually available as possible.