Keep jerking my cock

I slow down my pace of jerking, but I don't stop, instead I sit there and slowly stroke my cock while looking Millie in the eyes.

Millie's gaze alternates between looking at my face, and her looking at my cock, then, she slowly reaches behind her and unties her swim suit, and her big tits come tumbling out. They are amazing, really big and firm, and with light brown aereolas and pointy nipples.

I start jerking my cock more determinedly at the sight of my step-mom's naked big tits, and Millie's facial expression shows she is enjoying my reaction to her nudity, and she is just staring at my cock as I sit there and stroke it.

Slowly, Millie drops down to her knees and crawls towards me, her eyes focusing on my cock, and her mouth slightly open, her tongue wetting her lips. She stops when her face is just a few inches away from my cock, just looking at me stroking it, her tongue licking her lips.

She stays like that for a while, then she looks up at me, whispering:

"Cum for me, Matt."

I look down at my busty step-mom kneeling in front of me and start jerking more intensively. Millie moves closer to me and sits up a bit more, her big tits hanging so close to my cock that my hand brushes against them when I jerk my cock.

"Do it Matt. Bust that nut for me." Millie whispers while looking me in the eyes.

I reach down with my free hand to fondle one of my step-mom's big tits, while I jerk myself of with my other hand. My breathing is getting heavier now, and Millie smiles when she notices this and whispers:

"That's it Matt. Cum on my big tits."

That pushes me over the edge, and with a groan I feel my cock start to shoot cum into the space between my step-mom's big tits. Millie looks down on my cock as this happens, her hands rubbing my cum around on her massive breasts. We stay like that for a while as I finish cuming, then Millie looks up at me and says:

"You liked that?"

"Wow!" Is the only reply I manage as I look down at Millie, her big tits still shining with my cum.

Millie smiles back at me, then slowly stands up, giving me a kiss on the cheek, saying:

"Most things are more fun when you do them together, don't you think?"

"I could not agree with you more." I say and beam a giant satisfied smile at my step-mom.

Millie smiles back at me, then walks out of my room and into her room and I hear her turning on the shower in her ensuite bathroom.