Former Little Mix singer Jesy Nelson's 8-month-old daughters, twins Story and Ocean, have been diagnosed with a "severe muscle disease." "A few months ago, my mum noticed that the girls were not showing as much movement in their legs as they should be," Nelson, 34, said in a Sunday, January 4, video shared via Instagram. "[It] wasn't really a concern to me at the time because from the minute I left the NICU, I was told, 'Your babies are premature, so do not compare your babies to other babies. They won't reach the same milestones. Take them as they are.