2T4U/Jack/Raped Melony and Missy/Tiffany's room/Keep on encouraging her and asking her to come over to you
"Tell you what. If I lay on my back, you can sit right on top of my peepee." You stretch out with your stiff cock laying on your belly and your feet on either side of her. You reach out and snag a pillow off the bed to prop your head up. "He's got a name too," you say. "I call him Willy." (Actually you only just thought of it and Willy was the first name in your head. Kind of appropriate though.)
Tiffany sits, looking at your cock and the two balls in their sac hanging down. "Whassat," she says, pointing.
You don't want to give her a detailed anatomy lesson. "That's just part of my pee... Willy. They can be a bit tender, so you mustn't squeeze them too hard.
She nods and stands up. Seeing her bald little snatch from this angle make your cock twitch. "He jumped," she giggles.
"That's because he likes you Willy specially likes pretty little girls." You catch hold of him and give him a couple of strokes. Tiffany walks forward and sits down astride your thighs. This spreads her pussy open and Willy jumps again making her laugh. She hitches herself forward until she is sitting on your shaft. Judging by the big grin on her face, she likes the feeling. "Slide back and forth like you did with Wod... Rodger," you say.
She does as you suggest and the sight of her