No loving mother would want to see her children in a difficult situation or having a condition that was detrimental to their quality of life.
Olivia is faced with grief every day from her autistic boy's death and wonders what his purpose in life was if he spent it on earth with a disability - only to pass away at an early age.
She wants to know why he existed at all, since he caused so much pain in her heart and tore apart her marriage with her now ex-husband, David.  The answers do not come quick enough (despite trying to consult the town priest), but they do come eventually.