Isabelle was the lead singer with the Brussels jazz-electro based group Antena. John produced their first single back in 1982,
The Boy From Ipanema...yes embarrasingly enough a cover version of that Brazilian famous song. Also, Isabelle's claim to fame is appearing on backing vocals on Paul Haig's debut solo single and on the video
Running Away. It's a great video. Here it is:
http://www.youtube.com/watch?v=1Ew7rtY22TQ John did spend a considerable time in the Belgian capital and was dating a Belgian woman at the time. Out of this relationship his son John was born.
As you are aware John doesn't talk much about his private life. The only fact that I've raised this is that certain happenings in one own's private life can influence one's songwriting and it's direction. John from 1982 onwards appeared to be struck by Cupid.
You see, one also has to consider the underlying matters behind an artist's creations.
Chris