With all over avenues exhausted, Debbie and Andy know there is only one thing they can do...
But will they be able to go through with it?
Sarah's devastating illness has pushed Andy and Debbie to their limits. With little hope of a donor being found, they decided to try for a saviour sibling, through a series of IVF.
But when the treatment was refused, and other methods didn't succeed, Debbie makes one final plea to Andy - to have a baby the old fashioned way.
But when it comes to the crunch, will either be able to make the ultimate sacrifice, knowing it will destroy their relationships with Cameron and Alicia?
Follow their heart wrenching decision from Monday, 9 January.