If her body has sufficient testosterone, she will come. Excess estrogen in her body due to drugs, alcohol, smoking, medication or birth control pill/injection, or the natural adolescent process, will damp her vaginal orgasmic capacity. This is because the thickness of the vaginal lining (so does the skin lining) is proportional to the estrogen level. However, excess estrogen produces less impact on the clitoral orgasm capacity. The oversized breasts, waist or hips, resulting in geometrically inproportional body figure, is a sign of excess estrogen. Young women with big breasts experience vaginal orgasmic dysfunction more often than their counterparts.

It seems you are an underage young couple. Don't pursue her vaginal orgasm during your teenage years. You may damage her vaginal lining or cervix in a hard pursuit. That can result in vaginal infection or cervix cancer. Her estrogen level will start to ebb around age 20-25 in favor of vaginal orgasm. Generally speaking, womens vaginal orgasmic capacity reaches the peak of their life during age 30-40, where after age 40-45, women start to experience post-orgasmic pain/cramps in high-level orgasm.
For more orgasmic information, please read:
/cases/case8601.htm
and the tip in
/extra/tipo.htm
NOTE: If she cannot power up her G-spot and clitoris, she need ViaGrowth-III or -IV to help her out.