Yes. (Give permission)

You roughly pull the front of her nighty down exposing her delicious breasts. The full round orbs strain skyward. Their nipples stiffen angrily in the chilly air.

"Cum, sister."

Your command is almost inaudible. Gentle. One **** to another.

MMMMRrrRMRRrRMRRrRMRRMRMRrRMRRRRrMRRRRRrrrrrrrrrrrrrrrrrerreeerrrrrrrr!

You lean forward and greedily suck at one of her exposed nipples ensuring your lips form a tight seal. She quakes beneath you as your hand firmly presses against her lips to prevent the wails of her pleasure from escaping. She continues to spasm beneath you causing her breast to tug away from your firm latch. You quickly bury your face firmly into the fat of her breast to ensure no escape. You enjoy the warmth of her tender flesh and continual pounding of her heart raging inside her.

After several moments you notice the pace of her masturbation slowing.

"Did I say you can stop?!" you ask before sucking on her second exposed nipple.

Her muffled wails are replaced by sobs, but she resumes the pace of her fingers within her overstimulated folds.

"You can do better than that!" your chastisement is quiet but firm.

Her stifled sobs grow more intense, but the fingers within her panty increase their intense stroking.

"Good girl!" you encourage the broken girl within your grasp.

Mrrrrrrmmmmm....eeeerrrrghh....Mmmrrrrrrrrmmm...

Her strangled breathing is ragged and ****, but fear of exposure from you keeps her fingers punishing her well used clit.

Over the last few weeks the two of you had been **** to orgasm under the brutal training of your mistress together. Like you, Coraline is a natural submissive. You suspect a little more pain will edge her past overstimulation and towards another orgasm.