Statement made without intention of disrespect for the sunnah

Dear sir
Need your answer:

If a Muslim sister is told or hears about the sunnah that they should eat and drink by sitting. And the Muslim sister verbally says, ‘ you don’t need to sit and eat or drink that’s not right/true.’
Or the Muslim sister verbally says,’ Ignore him, he is not right, he is like that, he says silly things, he likes to tell/pick up on people by telling them how to do something or what to do’.

Does this affect the Muslim sister’s imaan. Does the Muslim sister get kicked out of Islam?
The Muslim sister does not have intention to disrespect the sunnah.

Shukran