Per puro caso, Ladder Of Years, by Anne Tyler (1995, USA)

Delia is a 40ish years old mother and wife, whose relatives, husband, sons and daughter don't mind at all, don't appreciate in any way. One day, without planning anything, she simply keeps walking on the beach and, as she's on the chance of a lift, she takes it: she starts and builds up her life again in another place.
What comes up the most is the pregnance of good communication. Peculiar and so involving.