Before She Met Me
Before She Met Me is a novel by English writer Julian Barnes, first published in 1982 by Jonathan Cape. It is a black comedy which scrutinizes the awakening of sexual jealousy in a dull and otherwise sensible college lecturer.

Overview
After fifteen years of marriage to a nagging woman who despises everything about him Graham Hendrick files for divorce and marries Ann, a beautiful former actress and seemingly the woman of his dreams. Initially he believes this to be the start of the good life and congratulates himself daily, hourly but as he learns more about Ann’s past he starts to obsess over the time before he knew her, resenting her previous love affairs, apparently unable to accept that she enjoyed a life at all before they met.  
As Graham imagines non-existent humiliations and concocts plans for revenge upon previous lovers his increasingly strange behaviour begins to alarm first his wife and then his friend Jack, whom he soon suspects of cuckolding him.

References

1982 British novels
Black comedy books
Novels by Julian Barnes
Novels set in London
Jonathan Cape books
Novels about marriage