Hi Planet, try this let her be on top, this way shes in control she can either bear down on you for more clitrol pressure, or she can finger her own clisous at the same time as she has sex, not all women orgasm by just vaginal sex alone, but this will also depend or just how much foreplay you have had, if you can take her to orgasm once or twice before sex she may find this better for her.
Good Luck
Google dodson and ross, you may find your answer there, its like every thing you wanted to know about sex, but was affriad to ask.
Clitoral stimulation is the only way a female could orgasm. The trick is to have that stimulation during any type of penetration. Penetration definitely enhances the orgasm, in most women's experience.
Many women can not have an orgasm with just intercourse. You can try using your hands on her while the two of you are having intercourse There are some positions that the two of you can try that will stimulate her clitoris during intercourse.