I actually quite like Ferne. I think she's the best of a bad bunch to be honest, she knows she needs to discipline Sunday but knows when to pick her battles - we've all been there at some point. I loved how she said to Sunday that it's not kind to smack mummy, it just seemed a really different way to what I usually see other parents do.
Where as Billie has let Nelly get away with so much and thinks her diva ways is cute, she's ruined that child and it's going to be very difficult for Billie to turn that around now.
As for Fernes looks, I feel she is easily led by the other girls, especially by Danielle.