Watching Millie in the shower

I hear Millie turn on the shower, and I sit there for a while thinking about what to do, but then I decide that she is sending me some sort of signal.

I quietly walk into her room, she has turned off all the lights in there, and the door into her bathroom is one third open. I slowly tip-toe towards it, and I can see Millie naked in the shower in there. She has her back turned towards me, but after a few seconds she turns around, looks towards the door, and I can see what I think is a small smile briefly flick across her face. She knows that I am there.

Millie starts soaping up her tits, taking her time, and then she starts moving her hand like she is jerking a cock, then points towards the door which I am hiding behind. She must be signalling for me to jerk-off, I think to myself, so I take my dick out and start stroking it slowly.

In the shower, Millie is rubbing her soaped up tits slowly, then her hand moves down to her shaved pussy, and she runs her finger over it.

I cannot believe my eyes, there is my big-titted step-mom touching herself in front of me. I start jerking my cock more intensively.

In front of me, Millie is using the shower to slowly wash the soap of her tits, then she takes the shower handle, puts it between her big tits, and starts rubbing it up and down between her breasts.

I am just standing there, starring in amazement, jerking my cock faster and faster.

The shower stall is starting to fog up, and I see Millie writing something on it. Very slowly I see the letters take shape in the misty glass:

"Cum in the glass"

Millie has written. I look around me, and I see a drinking glass standing by itself on her make-up table next to me. I grab it, and hold it over the head of my cock with one hand as I use the other to jerk myself off.

Millie is now pushing her big tits against the glass of the shower stall, and abandoning all pretense that she does not know I am there she is looking straight at me, her big tits flattened against the glass.

I feel myself cuming, and I make sure I got my cock completely covered by the glass, and my cum shoots into it. Millie is looking straight at me, I wonder how much of me she can see is what is going through my mind, as I watch my naked step-mom while cuming in the glass.

She can see me better than I thought, it turns out, since when I have finished cuming she smiles a somewhat shy smile, and behind showering of her body.

I just stand there for a while, starring at her, holding the cum filled glass in my hand. After about a minute, Millie has not really looked in my direction, and is showering normally, although a bit slowly. Figuring that I don't want to outstay my welcome, I slowly turn around and start walking away from her bathroom door, but then I hear Millie clear her throat.

I turn around, and see that she has put her arm out of the shower stall, and her hand is stretching out towards me. For a second I don't know what she is telling me, but then I figure it out and I slowly reach my arm in and hand her the glass filled with my cum.

Millie takes the glass filled with cum, pulls her arm back into the shower stall, then, while looking straight at me, she raises the glass to her lips, and takes a sip of my cum from it. I see her swallow, then she raises the glass up again, and drinks the rest of my cum.

She then waves her hand in the good-bye gesture towards me, holding the empty glass in the other, so I silently walk back into my room and crawl into bed.