The headmistress begins enthusiastically disembowelling Veronica, dumping her guts in a bucket. Intestines, liver, pancreas, womb, anus.... all get slopped in expertly.
"You still alive there dear?" asks the headmistress "Wouldn't want you to expire before the big finish."
The emptied shell that was Veronica coughed and spluttered in weak response.
"Oh goodie - this is my favourite part.. don't blink - or you'll miss it."
And with that, the Headmistress dug her hand deep into Veronica's chest cavity and pulled out her heart, still beating even without connection to the body.

"The part where I show you what your heart looks like.
Veronica Stares blankly at the beating red lump of meat, takes one final ragged breath of air, then dies on the spot, her eyes glazing over.
"Oh, YES, that's the way it should be..." As she reaches down to finger herself. She climaxes fast, grabbing Veronica's cooling body in a tight erotic hug.
"Aaaaaaang... uuuuuuh... Yes. that's it - oh god that was so good."
The headmistress's sopping pussy drips against her loincloth, a testament to Veronica's final pathetic moments.