There is a long tradition in Canada of asking religious to do far too much with far too little.
That said, at some point the good Sister needs to say “no.”
SHe doesn’t really look like a Sister, FWIW
https://www.pghtech.org/programs/BAU_SisterLindaYankoski
She is a young 70 for a congregation that is fortunate to be mostly Polish and third world. She is a silly post-Vatican II nun doing silly nun things.