My daughter wants to reveal her tummy and navel while wearing a lehenga. Is it okay to let her ?

It is not the concern of letting her reveal her tummy or naval the main concern is to preserve the values and morals which we gets from our ancestors.Every one has their own rights and choice to wear any thing of any type untill it will not harm or cause a bad impact on the society.As human being is a social animal and it is the duty of every human being to maintain the decorendum and values of the society