Natalie can't stop eating

My mum has been complaining that Natalie just can't stop eating. Her eating spree usually starts after 9pm, and can last until the time she sleep which is close to 11pm. She will start asking for milk, tibits, drinks, cookies - one after another. She can finish 2 bottles of milk in an hour interval. She will say she is hungry and want more food. Her lil' tummy is becoming more like her daddy's.