Riley (a.)

You hear Allison and Riley talking downstairs as they come in.
"We should..."
"Yeah. I'll go out first. No need to give them something to talk about." Tara straightens her clothes, and it's only then you realize that you had actually disarranged her shirt a little. Damn it. Control yourself, you think.
You reach the landing that looks out on the living room and kitchen as Tara is greeting Riley and Allison. The girls had a few grocery bags with them. They must be planning for dinner, since all the parents will be out to eat without them.
Riley's eyes take in Tara's wet hair, and she glances quickly from Tara to you. You smile, but she doesn't return it.
"...show me that thing you were talking about yesterday?" Allison is saying, but you missed the first part.
"Oh sure!" Tara is responding to whatever it was.
"Uncle James can we use your computer? Tara wants to show me something."
"Yeah go for it."
Riley approaches you after they depart, putting a hand to something on your shirt, and you look down to see damp splotches at various spots. Riley inhales sharply through her nostrils.
"So...that's why you blew me off, daddy?" She's bubbling with anger. "To come home and fuck Tara? You still smell like her..." Riley's face is beet red with anger and hurt.
"It's not like that at all Riley. Nothing happened here."
"I don't believe you... I can't believe you, Daddy!" she smacks your chest with her palm. "I offer you all of me, and you turn me down for some...some random slut?"
"Riley Marie!" you catch her wrist as she tries to slap your face. "Young lady..." you pull her close, gripping her by the hair with one hand and her wrist with the other. She gasps in pain. "You seem to think because your almost 21 and... because you sucked Daddy's cock that you get to do whatever you like, but I promise you, baby girl, you have made a serious mistake."
She whimpers as you frog march her up the stairs, wrist twisted up behind her back, and a fist balled in her hair. When you reach the master bedroom, you shut and lock the door, and throw her onto your bed, face first.
"Daddy..." she tries to rise, but you push her back down.
"Be still, Riley!" your voice takes on an air of command, and some deep seated instinct kicks in from her childhood, causing her to lie still, shivering.
"I didn't fuck Tara, Riley. I don't have to explain myself to you, but I will anyway. She was upset and I was talking her through some things. She never had a father to take care of her." You yank down Riley's jean shorts, exposing her luscious ass. You go to the drawer, pulling out one of your thick, leather belts. Riley knows. You haven't belted her since she was 12, but she remembers what happens when she crosses certain lines.
"Daddy....I'm... sorry. You're right...I shouldn't have jumped to conclusions..."
"You're right, angel. You shouldn't have." You lay the belt across her bare butt, and she squirms. "Don't fidget, Riley. This is for your own good."
In a modification of the punishment procedure of her childhood, you pop your cock free of your pants.
CRACK! You strike her pale butt unmercifully, and she cries out.
"If you want our little... encounters, to continue, then you had better remember who you are, Riley." CRACK
"Owwww!!! Daddy...." Her cheeks are growing red. You grab her hair and arm, pulling her to the side of your bed, so the she's face to face with your cock.
"Alright, angel. Either I can continue with the standard punishment, or..." your cock bounces in anticipation before her.