Can retroactive funds be used to compensate caregivers for the care they provided before the money was received?

I am the Fiduciary for Mother. She is 95 years old and has been approved for VA Aid & Assisistance. She has received her retroactive funds in the Ficuciary Account. I was not sure how these back funds can be spent. Can I use them to help pay for her medicine, electric and water bills? Also, the 5 children have been taking turns staying with her. A couple of her children are not being paid for staying as there was not enough money to pay each one of us and their financial condition was better than the rest. Would I be able to use these retroactive funds to refund them some of the time they stayed last year? Since I am in charge of the record keeping, I did not know what this back pay money could legally be used for. Should I just call and try to talk to a VA Representative about it? Thank you for any help you can give me. I do not want to do something that is not up front.

Bumping this up. Certainly, more details are needed.