"Keep sucking it"

I say and close my eyes. I feel Millie's mouth close around my cock, and her tongue starts to twirl around the head of my cock.

I put both my hands on Millie's head, caressing her, saying:

"Keep doing that."

Millie keeps moving her tongue around my dick's mushroom.

I let out a moan of pleasure, then gently but firmly start pushing Millie's head down, forcing my dick to the start of her throat. This makes Millie gag slightly, so I stop pushing her head down for a second while Millie gets her gag reflex under control. Then, I feel Millie nodding, so I push down again and my dick slides into my step-mom's throat.

I push all the way until my cock is in Millie's mouth to the hilt, then hold her head in place, enjoying the incredible sensation of Millie's throat on the top of my cock.

After a few seconds, I feel Millie start to try to move her head up, but I hold her firmly in place and start to move my hips up and down, doing so pushing my cock in and out of her throat. I let out a groan of pleasure, then say:

"You like how my cock feels in your mouth, you big titted slut?"

Millie makes an angry sound, and tries to move her head up, but I keep her pushed down and say:

"Don't talk with your mouth full."

I start to push my cock in and out of Millie's throat, holding her head in place with my hands. Millie relaxes her neck and jaw, allowing me to fuck her face. I start to pick up the pace of my thrusts, shouting:

"You like that?"

"Mmhhmm!" Millie mumbles in reply, unable to speak with her mouth full of my cock.

I feel myself getting closer to cuming, and with one final thrust I push my cock into Millie's throat, then feel my load shoot into Millie's throat.