The stage version, at London's Adelphi Theatre, has been reworked by Alexander Dinelaris putting Headley's Rachel Marron at the centre of the action and beefing up the role of Rachel's sister, and loverival - while also highlighting Houston's own canon of songs.
She tells us about Milton's recovery from a by-pass operation, about their daughter Janet's interest in boys ballooning to rival her love of horses, of how their son David became a devotee of Kipling during his father's year at Caius College, Cambridge.