Francis and Gabrielle dated in 1986-1989 - in their twenties. Francis considers Gabrielle his first 'proper' love, and proposed to her, but Gabrielle found it too much and didn't accept. The relationship was difficult from then on, and they realised sadly they had different long term wishes in life, particularly as Gabrielle's career was her focus. They agreed to split ways, sadly, but Francis invited her to his wedding with Claire as a friend. Gabrielle is one of the few people Francis could be frank with over how things are in his life now, and there is a risk that the more his love for Claire is beaten by her condition, that he would feel drawn to seek comfort in Gabrielle.