I think charm your enemy or silence the cruel from Ben Woodcroft Angelic Protection Magic would work. Both are aimed at stopping hurtful behaviors without cursing the person or causing more upset.
Alternatively if your open to working with servitors I recommend:
Ask her to protect the cat.
You could also use:
I’d be careful with this though as it’s clearly adverse to her natural thinking. I would use words like you don’t mind pea rather than you love her or something dramatic.