What Will Survive of Us by Howard Jacobson

Lily falls in love with Sam the minute she sets eyes on him. It takes Sam a day or two longer.

Curious, because Lily has never quite believed in love, while Sam thought he understood it inside out. Lily, a documentary maker, and Sam, a playwright, are both in relationships that have quietly expired, and an affair takes hold that they are powerless to resist. Arriving in mid-life, their relationship opens unexpected new worlds.

But what will happen to them when familiarity and age begin to take their toll? What will survive?