I love such girls and three my last female partners are such. Shaking is directly related to orgasm strength and also how much brain is changing during this. Usually all of them are girls who masturbated a lot and started doing it soon. And all of them masturbated unusually, developing their g spot. All of such girls adore and love sex.
You can check Honey Gold from active top girls, especially some early and gonzo things.
Andreina Deluxe is also good. Her scene with Lady Dee is superb. Some gonzo is nice.
And from former it is Lily Carter who is real queen on such, girl who loved sex as hell. Watch her early lesbian videos, they are extremely intense. You can check her interesting interview in This is Why I'm Hot 2. She has same masturbation habit as my partners.
Btw guys can also try this playing with their prostate, especially hard is usually orgasm with added prostate stimulation. At least I shake a hell lot myself.