Peter Andre is a “softie” when it comes to his children. The ‘Mysterious Girl’ singer admitted he is far more likely to relax the rules at home than his wife Emily – the mother of his youngest children, Amelia, eight, and five-year-old Theo – but he’s not been afraid to reprimand his young daughter now she has started “pushing boundaries”. Peter – who also has Junior, 17, and Princess, 15, with ex-wife Katie Price – said: “Millie is doing really well at school, although I’ll admit at home she has started trying to push the boundaries. But once we say her name in a stern tone, she listens. “Als…