I guess she isn’t familiar with this
Mat 5:37 But let your communication be, Yea, yea; Nay, nay: for whatsoever is more than these cometh of evil.
Let me show her the present translation (it’s simpler to understand):
Mat 5:37 (NIV) Simply let your Yes be Yes, and your No, No; anything beyond this comes from the evil one.
Excuse me I am not taking an oath!~