Fill her mouth.

“You're getting good at this, Honey.” I encourage her as she takes even more of me into her mouth. Each time she bobs too deep she has to pull away with a little gaging. In a way, this evidence that Alison is not the experienced slut she is pretending to be for my perverse sexual pleasure adds to my excitement. “Oh yeah! Suck that cock ... suck it good. I can't believe Paster Miller's innocent daughter is secretly a cock-sucking slut.” At first, when she lifts her mouth off of me, I think that I've gone too far, but she is clearly excited by the way I'm demeaning her.

“You're such a bastard, Sir.” Both of Alison's hand are twisting and pumping at my spit-covered rod. “You're getting off on using me like a cheap whore, aren't you?”

I push her head back down on my cock. I'm getting close and I want to make sure Alison gets the full experience of having a man nut into her mouth. “You're not a whore. If you were, I'd have to pay for this.” I can feel the cum building up in my balls and know I'm not going to be able to hold it for much longer. “You're a nasty little slut who does this for free.”

Alison's needy moan and the way her hands piston even faster is all that I need to push me over the edge. So much of my pent-up semen erupts from my cock filling her mouth and then spilling out over her chin and dripping down onto her tits.

Alison opens her mouth to show me the white jizz pooled on her tongue and then with a teasing smile she swallows like this is something she's done many many times before.

“You sure cum a lot for an old man.” Alison giggles once her mouth is no longer full. Her fingers slowly rub the globs of spunk onto her erect nipples until they gleam. “I couldn't even keep it all in my mouth.”

“Holy shit, Alison.” I shake my head in wonder, “I can't believe you did that.” This seems to finally break Alison out of her alter ego slut personality.

“Did you like it? Did you like having a preacher's daughter on her knees sucking you off?” She licks her lips getting the last little bit of cum that is still clinging to her full lips when a new thought strikes her. “You're not mad at me for calling you an 'old man', are you?”

I'm not at all mad, but it does give me a reason to spank this hot young ass of hers ...