Nanny Job in London, Ontario

Hi, my sisters husband has cancer and just had his surgery. She has 3 kids under 6 and a full time job and completing part time school. I live 3 hours away and want to hire someone to come in and give her a hand with childcare for a few hours the next 3 weeks once a week. This person will watch the kids, do light cleaning and meal prep while my sister works , gets groceries , cleans etc. she needs some help !