We were new to our house and, for one reason or another, we had guests that summer weekend in Colorado. Summers in Colorado are mild enough that no air conditioning is needed, but our bedroom was on the south side, and the sun really heats that side of the house. If we close our door, no breeze gets through and it becomes uncomfortably hot. So, even with guests, we left the door open.
As luck would have it, my wife and I got pretty horny, but we didn't want to risk being caught en-flagrante by our guests, so we stimulated each other under the covers, at least for a while. I found the perfect spot on my wife's clit, just to one side and near the base. I dipped my fingers into her wetness for some added lubrication and felt her body sink into the sensations.
Meanwhile, she gripped my penis with her right hand, just below the head, her thumb on 'top' and her three fingers just below my head. With her index finger, she just lazily went back and forth from the top to the bottom.
I'm a lucky guy in that I make a lot of pre-cum, and my wife loves it when I do. So, the more she idly moved her finger up and over, back and forth, the wetter I got, and, as I gently stroked her clit, the wetter she got.
Pretty soon, we had to shed the covers. I was getting close, but still in control. I could feel her body begin to tremble, her legs twitching now and then. As I felt this, I got even harder and started oozing even more pre-cum.
By now, she was totally focused on her building orgasm, and began to make little moaning sounds and her stimulation of me was now a bit spasmodic, too. My entire shaft was dripping with pre-cum and her fingers and hand were wet with it too. Her grip was beginning to slip a bit. All the while, her pussy was getting wetter and wetter.
Then, I heard her sharp intake of breath and felt her body stiffen as her orgasm gripped her. This is a delicate time, because if I stop stimulating her, she gets frustrated and if I bear down too hard, it hurts. So I'm trying to pay close attention to her pleasure, which is really hard because I'm on the ragged edge of cumming and her orgasm got me even more excited. Usually, when we stimulate each other we take turns, with one of us cumming at a time so the other can concentrate on giving pleasure and enjoying all the details of what heppens.
But, as she came, her hand began to jerk uncontrollably up and down on my cock. My cock is completely covered in my own pre-cum and her hand is wet with it too, so it just slides up and down even though she's squeezing pretty hard.
Well, that sends me right over the top and I have one of the most intense orgasms I can remember: I shot all over my stomach and her arm as she came, too.
It took us a while to come down off that one, and we repeated the exercise a few times in the following weeks, just to make sure we got it right.