Also remember that there's two fantastic areas to stimulate besides her pussy and breasts. Her mind/emotions.. and her skin! Words have a powerful affect if spoken with confidence and a piercing gaze.. you can literally see/feel her body react to arousal that is triggered by your voice. Obviously language varies depending on woman, context, etc.. but basic principles.. dominate and engage her arousal by projecting your masculinity.
As for the skin.. largest organ of the body. Make use of it! I've noticed that areas I'm sensitive in women tend to be too.. run the tips of your fingers over your own body and find those key spots. Certain crevices and patches, in places you wouldn't really think.. eg along the tricep on the side closest to your torso. There's sooo many to find. The woman I'm with was surprised because I found spots she didn't even know existed on her own body! You can relax her so much by playing with the skin all over her body, and if she's relaxed she'll fall into orgasm easily once you begin to arouse her more.
I would start with the words/gaze, kissing (especially the neck), fondling and embracing each other, peel the clothes off and play with her skin.. get her super relaxed.. then move towards breasts and pussy. Seriously, go slow and you'll make it easy for yourself, and she'll love it!