Screwed

What would you do for a fifty-quid bet? All I have to do is shag a certain boy. It's not as if I've never done it before - I'm no virgin. Sex is what I know - what I do. I thought I'd win this bet within a week. But how was I to know this was the one boy in the world who wanted a relationship rather than a one night stand? And how was I to know I'd end up wanting that too?