Abigail leaves her family for seven years to take care of herself. She walks out in 1975. She is profoundly unhappy and has deep grief and guilt over Susie's death.
"Her need to find herself, reclaim her place in the world as an individual, and escape her intense grief propel her to relocate to California. There she seems to find some solace, working in a vineyard and leaving motherhood and wifehood behind."
Eight years, not seven.