Okay, this isn't exactly chastity related, I was topping my wife, which she likes sometimes.
We started with some making out, and then I got on top like I was going for missionary. I pulled her down the bed, crawled up, and started fucking her mouth. Thanks to a few strong drinks, I was rock hard, but slow to cum.
I eventually turned, still on top, my dick in her mouth, and then began licking her. Her hand was awfully near, so I guided it to her pussy, and she went to town on it, I stayed in that position, like a dog over her with my dick in her mouth. She doesn't get herself off a lot, but she can really make those two fingers go over her clit. I could feel the orgasm building in her entire body under me, and it was telegraphing to my cock as well as her mouth stayed wrapped around it. When she came, I almost lost it in her mouth, but regained my composure enough to keep playing, Eventually, I had her riding my mouth cowboy style.
That was a new experience for me. I'd never been over her and in her mouth like that when she made herself orgasm.
In my device today writing this. I can feel things firming up in it.