This just happened this past weekend.
We were away for a long weekend at our place on a lake. We had just woken up and as usual I was caressing my wife's body over and under her nightshirt, feeling her breasts, stomach, sides, legs. She has the most wonderfully soft skin. Occasionally I would venture down to her panties and slip my hand inside to feel her. She's not much for morning play so this was all just for me since I love to feel her body.
Finally, after about 15 minutes of doing this, I needed some sort of release. I grabbed her hand and put it on my rock hard cock. Much to my surprise she obliged by gently rubbing and caressing my balls and cock through my shorts. It didn't take long for me to lose the shorts since I desperately wanted to feel her hand on me. I slid my shorts down to my knees and she continued lightly stroking and running her fingernails gently up and down my shaft. My precum was oozing out and she loves both precum and cum and how it feels and tastes. She was licking her fingers clean and would go back for more never changing what she was doing with her hand.
I had gotten to the point where I needed to cum desperately, so I started stroking myself. I had never done that in front of her so it was a bit weird for a moment until she suggested that I jerk myself off with her nightshirt and cum on her. Well that was all I needed to hear. I started really stroking with my cock wrapped up in her nightshirt. As I was about to shoot my load, I unwrapped my cock and shot about 6 or 7 ropes of cum against her side and belly. She rubbed it into her skin and down into her panties, making sure not to leave any cum untouched. Then she sucked on her fingers and kissed me on the cheek and said, 'I love having your cum on me.' Damn...she is a wonderful, dirty woman