Try taking it more slowly.

Maybe you went too fast. You instead call out to her, "Let's see the next one." You wonder if you're going to need to repeat yourself when she comes out with the next set. Fishnet stockings and a short skirt, with a tight black top. Her dick is tucked into the stockings and still leaking.
"Ok, turn around." She does, eyeing your nakedness still. "You like them?"
"Better than the last, but my freakishness is still showing."
"Well, try another one then. And don't forget your bikini," you tell her as you gesture to the clothes lying near your feet. She bends down to pick them up, and she comes to eye level with your hard cock. She stares for a moment, then looks down to grab her bikini. Her face bumps into your cock, and your precum gets on her face. She gets up and stands there looking at you, her face wet.
"Well? A good brother would clean up his goo," Cassie growls at you.
"Fine, then a good sister would do the same." You reach down to her wet stockings, and then rub your hand on your cock. She looks at your cock in horror as you grab her head and start licking her face.
"Ew...bro," she whispers before you press your lips to hers. Her eyes look sort of glazed over after you break the long kiss. She leans over, and starts licking the shaft of your penis. Her other hand is pulling down her skirt and then her stockings. She breaks contact to pull off her shirt. Then she steps into the thong bikini bottoms again. "Better put these on again...I think we are going to get wet," Cassie says wistfully as she turns and wedges them firmly between her ass cheeks. When she turns back she is pulling on the top and her hard cock smacks your side. You grab the head and turn to slide it between your butt cheeks.
"Oops bro. I got you wet again. Let me clean that for you." She leans down.
"Stop right there a sec," you tell her and she does with a growing smile. You walk to her bent over ass and pull aside the thong and smear your leaking cockhead through her crack and into her red pussybush and through to the back of her sac. You work it a few times to make it good and messy. You then stand there with your head against the back of her sac, leaking on it. Then you let her thong snap back into place.
"You got me wet again, too!" Cassie shakes her head at you.