When my wife and I were first dating almost 25 years ago, she was afraid to fly in anything. Our first trip together was from San Francisco to Sydney and for 15 hours she asked about every little bump, "is that ok?". I think the circulation to my hand was non-existent for 15 hours.
She was my first passenger a week after earning my PPL... she had been up with me and my CFI a few times. Now she hates flying commercial (for all the hassle) and loves flying with me. Last year we flew from Reno to Maine and on a trip from Portland, ME to Oxford, CT, we were in solid IFR for almost 2 hours and she was fine. She knows how airplanes fly and has had enough training that she can land the plane if she had to.
Now after 500 hours in the right seat, she points out other planes well before I can see them and points out every little mistake I make.
I think I am quite lucky.