Teach her! It will be fun and won’t start any fights. I promise.
In all seriousness, if you do teach her just encourage her to go off of feeling, that’s what helped me. If you feel it ‘lugging’ put your foot on the clutch and shift down.
My dad’s instructions for clutch and gas at the same time did not help and contributed to me having to replace the clutch after a year of ownership.
36/m US. I learned to drive a manual when I was 18. I prefer it now to automatic and even more fun in a little econo shit box. I rented a Kia Picanto in the U.K. and had the time of my life.