Mother Zoe Elliott has to separate them because both her children have cystic fibrosis, which means they are prone to picking up bugs and infections.
She was absolutely terrified every time she got ill."Lucinda died very suddenly and Jodi realised that could happen to her too."Jodi was in her final year studying physical geography at King's College, London, and hoped to take a gap year to travel around Australia and Asia after graduating.
On her return she planned to do a Masters and become a chartered surveyor.
Before she died Jodi had spent a month receiving intensive massage and intravenous antibiotic treatment at Papworth Hospital in Cambridgeshire.
Doctors carried out a heel prick test when she was six weeks old and they discovered she had cystic fibrosis, a genetic condition that sees the lungs become clogged with a sticky mucus, making it difficult to breathe.
In this situation, there is a one in four chance the child will not inherit either of the faulty genes, a one in two chance they will inherit one of them and be a carrier but not a sufferer, and a one in four chance they will inherit both genes and suffer from the condition.