Tell her the entirety of her own life story and drag the sad bits out for as long as possible.

"And then Moonflower, who was the best, most kindest, most caringest, bestest mother who ever did mother, died. And Bluepaw cried so hard, she just couldn't pull it together. She cried harder and harder and harder and harder and harder and--"

"THAT'S ENOUGH, THANK YOU."