The Potter's only daughter.

Before Lily was born, Ginny was really unwell. During labour, Lily gets stuck and Ginny's in more pain than before. Lily's able to move and is born 4 hours later than expected. This makes her birth the longest in Potter and Weasley History. But when Lily's a toddler, she gets an infection which stops her from being able to use her legs till she's 8 years old. How will Harry, Ginny, James, Albus and the Weasley family react to Lily's mysterious condition?