Harshly.

You strip off quietly before kneeling down over Kara. In an instant you lash out, slapping her hard across her plump, rounded breasts. The soft girl flesh swings hard under the strike and Kara's eyes bolt open, her body swinging around in panic as you clamp a hand around her neck and squeeze hard. Even if she doesn't need to breathe, its still her instinct and the sensation of sudden **** evokes a deep primal fear in her.

"Hello pet," you growl, seizing the breast you slapped and sinking your fingers in, gripping it as tightly as you are her throat.

A calm seems to come upon her as she becomes aware it's your grip she's being held in. Still afraid, still hurting, but trusting that this is necessary for her domestication. Looking down her body as she arches, you can actually see it's more than that as she begins to grow wet from the treatment.

"Well look at this," you reach down, releasing her chest to seize her crotch, driving a finger straight into her wet slit and making her tremble. "Do you like it when I hurt you Kara? Do you like it when anyone hurts you? Was Supergirl a masochist who got wet every time someone gave her a beating?"

Your finger strums away inside of her, making her hips wriggle as you keep your iron grip on her neck. In your astral vision the pleasure centres of her brain greedily consume the available energy, starving out the rest. Kara can't answer you, and as her eyes begin to roll back in her head and her face turns pale you release her, letting her gasp and cough as you reach into your pile of clothes. You pull from it the item you picked up on the way back, a bright blue collar with a metal diamond shaped tag dangling from it, 'KARA' printed in big bold letters across it.

Grasping her by the hair, you pull Kara into a kneeling position and her eyes widen as the catch sight of the collar, understanding its importance.

"If we're going to do this, we're going to do this properly," you tell her, tightening your grip on her soft, golden locks. "I meant it when I said I'd domesticate you, and if you're going to become an animal, become my pet, you should dress the part. Now sit still."

She shivers and obeys, letting you release her hair to kneel down and set the collar tightly around her neck, like a ghostly reminder of your grip. You admire her for a moment, how for all her power she's so frail, the cracks that you're sinking your fingers into.

"I'm being harsh with you because I have to be," you explain, stroking her face. "I need to break you down so that what you want to be becomes instinct."

Her eyes shimmer, then she nods in understanding, some light of intelligence behind them dimming as she does. A smile even graces her face as she sinks further away from being a person. It warms your heart and stiffens your cock to see it. Taking a fistful of her hair again, you sit back on the bed.

"Now, I believe I promised you some training. You're going to be used for more than just breeding, so let's work on what your mouth is going to for."

Her lust filled eyes fix on it, but she's slow to understand. In your astral vision you can see her mind struggling, the controlled damage seeping into her ability to comprehend the world around her. That's okay, that's good, she only needs to be able to obey. And so you guide her lips to your dick and begin to press into her little mouth and down her tight throat.