Animal Cruelty

"It is like killing one bird with two stones," she tells me.
"Wait. Two stones? Why would you use two stones? Are you really that mean?"
"What? Wait, no."
"I mean, the first stone would likely be fatal, so what is the second one for? I think a second stone would just be overkill. You are cruel," I told her.
"But, that's not what I meant!" She cried, "I meant to say 'kill two birds with one stone.'"
"Oh, I see. So now you want to take out a whole family of birds. You are sick. What next? Babies?"