Ankha is not dancing for you. She's busy judging your confidence to look her in the eyes. Or maybe this dress is too tight and she would like to ditch it to be more... precise with her movements?

... Oh, that's what she meant. If you're thirsty for some soft and delectable feet, you should stay. However if you're tiny though you should not run as well — she looks like her footsie stomped a bunch of your lot so she wouldn't miss anyway.