"Why don't you kiss it?"

I hear myself saying, not sure where that came from, and I realise that I am still stroking my cock in front of her, although at a slower pace.

"Matt, I am not sure what your problem is, but whatever it is I am sure it is hard to pronounce."

Millie says and rolls her eyes, but then I see what I think is a bit of a glimmer in her eyes as they briefly dart down and look at my hard cock for the swiftest of movements. Then she is back to looking me in the eyes again.

"You seriously going to keep this up?"

Millie asks, shaking her head, looking at me and twisting her lips, her facial expression seeming to suggest that she is more amused than disgusted by seeing me jerk-off in front of her.

"You like what you see?" I ask her, not knowing how I have worked up the courage to ask my step-mom this, must be that proverbial little head doing the talking as opposed to the big head.

Millie rolls her eyes in reply, saying:

"Matt, I've seen a few dicks in my time, and believe me, yours is not that impressive."

Something turns me on massively hearing my step-mom talk about dicks like this, and I start jerking myself faster in response, and say:

"Oh, you like big dicks?"

Millie winks at me in reply, licking her lips slowly. I just look at her, stroking my cock more intensively, my breathing getting heavier. I close my eyes for a few seconds, then when I reopen them I see Millie just staring at my cock, looking mesmerised, but when she sees that my eyes are open she averts her gaze, looking me in the eyes instead, and we stay like that for almost a minute, me and Millie looking each other in the eyes as I jerk my cock, then I close my eyes and I feel myself cuming.