Edging might help, but it doesn't work with my current partner. She just "loses" the ability to orgasm if i edge her for more than 4-5 minutes. Still, i think it's worth a try. Teasing however makes wonders with her. Her orgasms are mind blowing if I sent a few sexy messages during the day to keep her horny. Then I will just play with her body and tease her for a good 10-20 minutes before moving to the main dish ;)

If you are more open minded you can try sex toys to enhance her (and yours!) experience. We are using <a href="https://www.amazon.com/Lush-Powerful-Bluetooth-Control-Vibrator/dp/B0176AGVF4 ">vibe</a> and we both love it, it makes sex and orgasms so much better. It makes your penis feel "thicker" + the magic of vibrations. It tends to slide, especially when going super fast. We usually do it sideways and I hold it in place;)

If she is more of the vaginal type you can always use a <a href="http://www.micropenis.info/2016/09/best-cock-sleeves.html">cock sleeve</a> if you feel comfortable with the idea.. It will allow you to hit deep vaginal spots your penis can't reach, which might (or not) like...