First, let me warn you I am a 'romantic dom', where I like to be in control but focus on pleasure, not pain. So when I woman wants to be the dom, I view it like that and not, say, BDSM. When a man is the sub, having her riding is common. Often there is the Lean Forwards (grinding her clitoris) or Lean Backwards (for her g-spot). Since men tend to orgasm first, a dom female often keep going when he rather “roll over and go to sleep”. Many riders like to see her partner's eyes, and may fuss if she can't get that.
(Men get to see his penis go in)
Another huge thing: orgasm denial. He lays down top side up. She sits either on his legs (most common) or abdomen. She gives a hand job till he is about to orgasm. Hopefully he will give a clue. She then press HARD on the bottom part of the shaft and prevent to ejaculate from coming out. Then when he settles down, give him a break and repeat till he can't stand it anymore, or she miss the opportunity. Playful slaps can also be done, as the penis moves back and forth.
Sitting her clitoris over his mouth is another possibility.