Can I get retroactive pay for having been my mother's Caregiver from September, 2013 to August, 2014 in Ontario.

I lived with my mother 24 hours per day with 1 hour respite each day from Personal Support Workers.
I have asked my sister, who is my mother's Power of Attorney, to help me, but she refuses to give me any compensation, saying I should be ashamed to ask to be paid for having taken care of my mother. I did not ask to be paid during the time period because I was afraid my sister would say exactly what she is now saying, I am on government assistance, and could definitely use the funds, but regardless of my financial situation, should I not be compensated for the work I did?