Yeah - try the G-spot route (lots of info on Pixies about this). It give your clit a rest when you're super sensitive.

Another way to try might be to have him kneel between your open legs with his cock inside you, moving just enough to keep him hard. Then do it yourself, spark those stars!. Tell him to keep moving gently when you come - if you can stand it - or just be still for a few moments. Then he can start again - still gently - and when you're ready - go for another one. And another. And another. When you're satisfied, tell him "Right, thiis time you can come too." When he realises you're coming, he can start moving more urgently. He will be late, of course, and and you should get a very long and satisfying orgasm.

Would that be nice enough for you?