Here are some sex positions with the woman in control. Often these positions help allow the woman to achieve orgasm.
The Reverse Missionary - The woman straddles on top of the man. An advantage to this position is the woman can lean forward and rub her clitoris against the man's pelvus to help her reach orgasm.
Chair Straddle - The man sits in a chair and the woman straddles over his lap facing him. She controls the speed and depth of the penetration.
Oral Squat - The man lays on his back, the woman squats over his mouth for oral stimulation. This sexual position holds two advantages for oral sex. Most men are extremely excited with the woman's genitalia exposed to them in this position. For the woman, in addition to the oral stimulation, she can grind her pelvus against the man's mouth and chin.
Reclining Opposite - The man lays on his back, the woman kneels over his penis facing him but then reclines backward resting on her arms for support. This position is great for G-Spot stimulation with the man's penis stroking the upper wall inside the vagina. The woman is the primary one in control of the angle, depth and speed of the penetration.
Reverse Cowgirl Sex Position - The man lays on his back, the woman straddles him facing the opposite direction. This allows the woman to experience very deep and controlled penetration.