Jerk-off here

Unable to contain myself, I reach into my pants and start stroking my dick. Millie's big tits look amazing when they are wet, and her hands are moving around in her hair, giving me a great and unobstructed view.

Millie then turns towards me, giving me a full frontal view of her big tits. Her eyes are still closed, her hands are in her hair, rubbing the lather out.

Water is running down my step-mom's big tits, and I am staring right at them, jerking on my cock.

Then, suddenly, Millie opens her eyes a little, then opens them widely, staring straight at me, screaming:

"What the hell Matt!"

She covers her breasts with her hands, quickly reaches out of the shower stall for a towel to cover herself up with, then screams:

"What the hell are you doing?"

I look back at my step-mom in shocked silence, my cock still in my hand, Millie staring straight at me with a furious look in her face.