Why Nayantara Is Behaving Differently?

Kollywood is underlining typical decisions of Nayantara. She performed in the film 'Billa' wearing skimpiest dresses and looked hot.

But when she was asked to wear similar costumes for the film 'Yaradi Nee Mohini' with Dhanush, she said a bitter 'No'. She said that she would act only in 'full cover' in the film. Why she is showing that difference?

When enquired it was revealed that the Yaradi Nee Mohini producer is offering lesser remuneration when compared to that of 'Billa'. So, it's all against money. If there will be any producer who pays more than that of 'Billa' producer then what Nayan wears?