How are her 3 children Canadian born if one was born in Morocco.? I would highly suggest not going. A baby born with respiratory problems could mean as little as a week or two needed in the NICU. If your niece was able to return to Canada for many years while her mother remained sick there must be other family who has did the caretaking. Does her mother have other family in Morocco? It is not only about proving that your mother was ill you have to prove that there was nobody else who could care for her mother.