Kelsi goes for it

Without any warning, suddenly Kelsi leans forward and wraps her lips around the head of your cock. You feel her warm, rough tongue as it swirls around the head. You make eye contact and can see both fear and nervousness in her eyes as she tries to make sure it's okay.

"Oh baby, that feels so good," you say, aware that if you can hear Derek and Lisa, they would be able to hear you.

Relief floods her eyes and she starts sliding her lips down your shaft, never breaking eye contact. You had looked a woman in the eyes as she sucked your cock before, but it had never been as sexy as that look from Kelsi. All she wanted was to see that she was pleasing you...and she certainly was.

"Fuck, sweety, that feels amazing," you moan softly, running your fingers through her hair as the head of your cock hit the back of her throat. She didn't gag, just started back up your shaft. "I've never felt anything so amazing."

When she got back to the head, she swirled her tongue around it again, this time taking a moment to focus on licking the hole. That caused you to bite your lip to stifle a moan, and you saw a look of glee on her face. She picked up the pace as she slid back down your shaft.

"That's right you dirty slut, suck that cock," Derek said through the vent as your cock again hit the back of his daughter's throat. "Lick my balls."

Kelsi's tongue instantly darted out of her mouth and clumsily attacked your balls. In surprise you almost moaned allowed, barely catching yourself.

"Oh gods, Kelsi, that feels so good," you say softly, much to her delight, as she slides back up your cock. You couldn't bring yourself to talk to her the way Derek was talking to Lisa, so you smiled down at her. "Your such a good little girl. I've never had anyone make me feel so good."

By this point she is just bobbing up and down your cock in excitement. You weren't lying when you said nobody had ever made you feel that good. Most women were awkward at blowjobs because they are just trying to get through it, but she was actually watching you, focusing on finding what brought you the most please. She had even added a little suction to it.

"I'm about to cum down your throat," Derek moaned. "Are you ready for it?"

You heard the muffled sound of Lisa trying to talk with her mouthful.

"Fine, then what do you want?"

"Please, daddy, will you eat my pussy?" Lisa asked, and her daughter's eyes went wide. You couldn't tell if it was from hearing her mother say that, or from her own excitement. "Eat me until I cum and I'll let you stick it in my ass."

"Do you...want to do what she said?" Kelsi asked nervously.

Your mind instantly went to burying your cock in her innocent little ass, something else Lisa wasn't into, then realized that wasn't what Kelsi was talking about. She was asking if you wanted to eat her pussy. Damn right you wanted to do that, but you also didn't want her to stop sucking your cock.

"Do you want me to eat your pussy, sweety?"

"Is that...like what I was doing?"

"Kinda, except you are the one who gets to feel amazing," you said.