AS she heads slowly towards her brightly decorated, all-pink bedroom, Ashanti Smith turns and smiles at her mum with every step. Just like any eight-year-old, getting her to stick to her bedtime is a huge struggle. But for mum Phoebe, it is harder than most. Ashanti is trapped inside a body "aged" like that of an 80-year-old woman, so every step takes its toll on her wellbeing - and every second spent with Mum is precious. The Sun