You mentally laughed at her for being so gullible. MAN, that was too easy! You kissed her on the lips and began to unbutton her top. Her breathing faltered as her shirt was removed, exposing a bra. You smiled warmly at her and unclasped it, exposing her breasts. She smiled shyly back and you undid her shorts. Gently pulling them down. You looked into her eyes as you pulled her panties down, leaving both of you fully nude. You quickly scanned the room, ensuring the curtains were closed, before returning to her. She looked at you nervously as your eyes roamed her body. You smiled at her again and held your dick in a hand. You pushed it into her torso and she giggled, before holding it gently in one hand. You began to touch her breasts, overjoyed at the prospect of illegal sex. You fondled them, rubbing your thumbs on her nipples as her hands explored your member. You bent down and fit a finger into her pussy. She moaned involuntarily as you began to kiss her tits, licking her nipples. Her hands came over your back as you fit a second finger into her vagina.
As you began thrusting into her pussy, she began screaming. Surprised, you sat her down on the sofa and began to lick her clit. She ran a hand through your hair and it wasn't long until she came. That done, you picked her up, bridal style, and carried her upstairs, eventually finding her bedroom and dumping her in her bed.
You clambered over her and hugged her, kissing her full on the lips. She hugged you back, fiercely, with her legs coming over your thighs to keep you in place. You rolled over to let her on top and smooched her until she came up for air. She smiled shyly yet again and you took the time to explore the room. You noticed she was sharing it with... someone.
"Harmony? Do you have a sister?"
"Hmm?"
"That pink bed there."
"Oh, yes, that's my sister's, Holly."
"How old is she?"
"9, nearly 10." By now, Harmony was clearly eager to continue, yet her eyes betrayed her fear. You, on the other hand, were feeling... adventurous.
"Holly's a nice name. Would she like to... meet me?"
Harmony looked aghast and you began laughing to lighten her mood. Still on top of you, she replied "Absolutely not! and besides, she'll be home in a few hours, we really need to finish by then?"
"You're right, don't want to have to explain this to her." You invited her down for a hug and stroked her back, feeling her body against yours, yet thinking back to the few times you'd seen Holly...