Amy Jenkins: Funny Valentine [2003] paperback

Stevie was a young woman who took life very seriously indeed: wouldn't drink coffee if it came from a chain, would never buy a card on Valentine's day. Why would she, of all people, be sent to spend a week with a film star? Why would she, of all people, fall in love with him? Why would she, of all people, get involved in the fame game? Why would she, of all people, send him a Valentine? A Valentine that blows it all apart. Funny Valentine.