Orgasm is allowed to happen or not happen. It is also helpful for the giver to not expect anything in return. Just allow the receiver to enjoy the massage and to relax into herself afterwards. Of course, other sexual activity may follow but it should be entirely the receiver's choice. This perspective will build greater intimacy and trust, and will greatly expand your sexual horizons.
Bathing is always helpful as it relaxes both the receiver and giver.
A quiet space is desirable with pleasing music, candles, pillows, etc., or whatever makes the participants relax and feel safe. Allow yourself enough time and do not hurry through the process. Go to the bathroom before beginning the massage. The best results will occur when the bowels and bladder are empty and you will avoid the unnecessary experience of interrupting the massage to go to the bathroom. Place a pillow, covered with a towel, under her hips.