just remind her- quilting is as individual as each of us- and just because one person says 'this is the right way' it does not mean it is for everyone- it's only the right way for that person...she will relax as she gets some experience (maybe) i do know quilters who have used the same everything for 25+ years- done everything the same way- and feel anyone who says they do it differently are....well- not to be listened to....there will always be those people
it does not matter if you know a new- better- easier technique --- if it's not the way they were taught- it is wrong-period! you just have to smile- and walk away-