It's wrong to rearrange someone's house without their permission.
Jill has been going to her sister's house to catsit while her sister is away, and noticed that the house is in terrible shape.
Jill wants her sister's house to be nicer.
Once Jill's sister is back, Jill suggests helping her refresh her decor a bit.
Jill decides to move furniture around and redecorate her sister's house, while her sister is gone.
Jill's sister is happy with the suggestion and enjoys working on her house with Jill.
Once she comes back, Jill's sister feels intruded upon and judged by Jill.