I was taught that more females remain as carers and that one in three marriages disolve after the partner is changed by disability.
Likewise parents whose marriage/partnership changes when the child is or becomes disabled often part.
That is one reason facilitating life stories for those involved has to be handled sensitivly..It can cause setbacks for the participant when touched on without backup if upset is caused.
Journaling is one example..time lines another...allowing student to question a cared for person is a sensitive area also..