7-9 ("Kama Sutra" pos. 3--Doggystyle): Taking her in the doggy position, she cums, while you don't cum.

You & Charlotte move to the bed, where you then put her on all fours, and move behind her. Playfully, Charlotte wiggles her butt for you, then gives you a good twerk. When she sees that she's delayed you for a minute or two while she twerked, she giggles, then gasps when you gently slap her butt. You slide in, and grab her hips, as you start to move inside of her. Charlotte gasps, crying out softly as you start to quickly speed it up, while pushing harder. As you move at that hard, deep, fast rate, she grabs her bouncing breasts with one hand, and plays with her nipples. It doesn't take very long, before you drive Charlotte close to cumming. When she does cum, you feel her cum hard. Charlotte shudders, gasping hard, then breathes heavily. Your dick gets milked tightly by her pussy, as her juices start to run all over your dick.

(Mark +1xp for making her cum. Running total of 24xp.)