Hi. I realise this is a really old post but I am Fiona, Ailsa McDonalds daughter. She married Tom Mylechreest and indeed had Susan my older sister and myself. We lived in Ramsey. Indeed my parents did divorce and she never married again. Unfortunately he she passed away at the young age of 52 before my first child Gemma was born. She stayed on the island while both my sister and myself moved to England for our further education and stayed here. Sorry this info is so late.