Weak....

You should stop this. You should get up and leave right now. Riley's advances are unhealthy, immoral, inappropriate. She's starting at you with a desire that she should not... cannot have.
But... you are still smarting from Jenna's newfound penchant for humiliating you. Your pride, and ego, are wounded. And Riley, beautiful Riley is stroking that wounded ego right now.
"I appreciate your concern...baby..." you stroke her cheek. "But... that's just part of our relationship. I know it may have sounded... bad..." you swallow. "...but we're okay."
"I can tell that it's not okay, daddy." She leans her face against your hand. "I can see it in your eyes that you aren't happy."
"Well... I am perfectly fine, honey..." without really thinking about it, you spread your knees, and Riley slides in between them, getting closer. Your pants are getting soaked from her wet body.
"If I was Mom....I would never treat you like that. You're such a good husband to her. You deserve to be taken care of." Her wet hands slide up your thighs. It's wrong. She's... she's.....she's making you feel good is what she is.
"We... we can't...." you say as her hands get close to your crotch.
"Then go inside, daddy." Her eyes lock on yours. Her hands get ever closer. It's the easiest thing in the world to just... do nothing. Her hands find your bulge, and to your embarrassment, it's quite prominently tenting your pants. Emboldened by your silence, and your obvious arousal, Riley slowly pulls your zipper open. She's starting to breathe heavily. You can stop this anytime....is she really going to do it? Your curiosity and ego, fueled by lust, are taking your morality and sense behind the woodshed right now. Riley slides her fingers into your pants, and grins as she frees your cock. She's now holding you cock. The image doesn't process.
"....I knew...it would be a nice one..." Riley sounds like she's talking to herself.
"Riley...you shouldn't..."
"Then...go... inside....daddy....." she punctuates every word with a little stroke, and then pops your head into her mouth.

"Fuuuck...." it's all you can say as your angel sucks on your cock. This is...it's wrong...it's....fuck it feels good...she's so beautiful...her lips....her tongue...her hot breath and good technique. She pushes down, and after a second, passes her throat barrier and deepthroats, gurgling and coughing spit onto you before pulling up and off, with her eyes watering.
"I did it....it's bigger than my daddy-toy, but I've been practicing." She double strokes your cock, looking into your eyes with love. "I got it all the way down, daddy."
You can't help but be proud. "Good girl."
"I told you daddy...you deserve to be taken care of...If she won't do it...." and with that though, she returns to polishing your knob and shaft with abandon. Your mind blanks. The wrongness is there, but fuzzed by pleasure. Riley sucks cock better than her mother, you think. It's a terrible thought, but one that fills you with heat. You put a hand on her head, helping her efforts.
"...that feels good."
"Mmmm." she hums with joy and delight, her eyes smiling at you over lips fixed in a lewd "O" from which protrudes half of your dick.