David Greig 
Midsummer [a play with songs] [EPUB ebook] 

Midsummer's weekend in Edinburgh. It's raining. Bob's a failing car salesman on the fringes of the city's underworld. Helena's a high-powered divorce lawyer with a taste for other people's husbands. She's totally out of his league; he's not her type at all. They absolutely should not sleep together. Which is, of course, why they do. Midsummer is the story of a great lost weekend of bridge-burning, car chases, wedding bust-ups, bondage miscalculations, midnight trysts and self-loathing hangovers.