Still Life by A S Byatt.
 
Frederica Potter arrives at Cambridge University greedy for knowledge, sex and love. It isn’t long before she becomes infatuated with a mysterious and controlling poet. Back in Yorkshire, her sister Stephanie abandons academia and is confronted with the boredom and frustrations of motherhood. Meanwhile, their younger brother Marcus begins to recover from a nervous breakdown. Each sibling is desperate to shape their own future, but a horrifying event will soon change their lives forever.