Um.... can't you wear her out most of the way before you get yours? Unless you have the serious physical disabilities Faba has pointed out, it's just not that difficult. Give her a toy, give her a hand?
I'm stunned that this is even an issue, and I'm actually kind of sorry for y'all. I used to not have -any- orgasms. Not a one. To have someone point out that my ability to keep on coming, as it were, is a problem for them...