Sandwich a novel

"For the past two decades, Rocky has looked forward to her family's yearly escape to Cape Cod. Their humble beach-town rental has been the site of sweet memories, sunny days, great meals, and messes of all kinds: emotional, marital, and--thanks to the cottage's ancient plumbing--septic too. This year's vacation, with Rocky sandwiched between her half-grown kids and fully aging parents, promises to be just as delightful as summers past--except, pe...