It must be very sad that the most beloved pet died. People's feelings for small animals are often the purest and most loyal, like good friends. Now it's like a good friend has passed away, and there will be a great emotional setback.
As a good sister, you have to enlighten her well. It is recommended to bring a bouquet of flowers. The fragrance of flowers can calm the mind. She must be very weak recently. Have a good conversation with her. In addition, you can also bring some kitten supplies, just like the spiritual legacy of the dead cat mother, let her place her spirit on the kitten.
You can also customize a crystal photo frame, put the photos of her and the cat in it, as a commemoration, and keep it well. The important thing is to comfort her mood, it will always pass, take good care of the kittens, I hope it will be helpful to you.
Other recommended comforting gifts: chocolate, sunshine jar, music box.