Reptilian brain takes over...

You reach up to put your hand around Riley's slim throat, squeezing as you pump in and out of her tight pussy. Her eyes begin to bulge and her face slowly turns red as you constrict the airflow.
"Daddy..." her voice is a pinched croak. Her hands grip your arm, squeezing.
"You are mine, little girl. I brought you into this world, and you will submit yourself to me." Her bulging eyes meet yours, and she nods weakly.
"You should never have asked daddy to fuck you, little girl." You growl, but you also let up a little on your grip, fine tuning the amount of air she can get in. "That was totally wrong. But since you did... you're going to be daddy's good little girl. Aren't you?" You squeeze a little harder, until she nods rapidly.
"Yehzz...." it's a wheeze. "Yehzz, daddy..." she rubs the arm that's **** the breath out of her. "I'll...." she can't speak anymore, and you relax your grip to let her cough and spit.
"What was that, Riley?" You grab her jaw, looking deep into her eyes.
"I'll be whatever you want me to be, daddy. I'm yours. Please do whatever you want."
"That's exactly what I like to hear, Riley." You pound harder, and she begins to whine and moan, still hoarse.
"On Monday, you're going to come to the office and apply for a job as Kayla's assistant." Pound, pound, pound. "I'm going to conduct the interview myself... privately..." Pound, pound, pound. "And then...we're going to have a great summer, you and I." Here it comes.
You pull out, climbing up onto her stomach and sitting down hard, squeezing the air from her diaphragm as you stroke your load onto her face and chest.
"Y..ehss..daddy..." she opens her mouth to catch your seed. You roll off, laying back against the pillows. Something...reptilian...inhuman, has taken over a part of your brain, now. What have you done?

Riley sits, up, covered in cum, panting, tears running down her face. "Wow...Daddy...that was...." She touches her throat gingergly. "I never expected all that... you were so... primal. So... savage."
Regret is starting to build. You treated your precious little angel like a fucktoy. You start to look for the words to apologize until she smiles. "I loved it!" She winces. Her voice is going to be wrecked for a little while. She puts a hand on your chest leaning forward. "If it had been someone else, I think, I would have been too scared, I would have felt too...degraded... but with you..." she smiles. "I know that you love me more than anything in the world, so I was able to trust you. God...it was so good! You're an animal, daddy. I love it!" She collapses onto your chest, smearing your own cum on your pecs.
"Good...baby...that's... that's real good."
Yikes.
You clean up and head out. Riley has to pick up Allison, so you'll be home before her. You roll into the driveway at 2:15 pm.