I don't know if it's possible for a working woman to settle into the role of a house wife without any problems whatsoever.
I think the important thing is to be realistic about her new role. Allowing herself time to adjust and not losing touch with herself as a woman and an individual.
Being a housewife doesn't have to be boring and lonely. Keeping a nice home can be very rewarding. And coffee mornings with other local wives can be great fun and very liberating.
Any change of environment can take time to become comfortable.
Of course if being a house wife is not something this woman wants; then forget it and go back to work.