Miranda traps Nicola but is she too late to save Steve's life?

The Parker's are at breaking point with Steve close to death and Nicola

on the run. While Bridget and Miranda know what caused Steve to get
sick, putting Nicola away relies on finding the source of the contamination.

Bridget locates the contaminated food container and Miranda traps
Nicola into a confession.

Miranda hands her sister over to the Police and the shock of her sister's final rejection sends Nicola over the edge of insanity.