Hot Summer Job/Stay standing like this till things settle down

How did you wind up in this situation? Standing naked in the middle of the entry way holding your 10 year old sister in your arms with the head of your cock pressed right up against the entrance to her pre-teen womb. She has a death-grip on you, you couldn't pull out even if you wanted to, and you just KNOW you are about to cum.

“All right,” you coo gently into her ear, “It's all right,” you hold her gently, no longer trying to get her off of you. It is inevitable at this point, you are going to fill your kid sister full of your virgin load of cum. Having accepted that, you are not panicked about it any more. In fact, you are somewhat looking forward to it and you are a little amazed it hasn't happened yet. You were so close a second ago when you were pushing yourself in.

You continue to coo a little bit and begin gently shaking her up and down in your grip. Not enough to really move her on your dick, although the vibrations do feel pretty... good, but your primary objective is to comfort her with the slight shaking motion. Meanwhile, you mentally envision the inside of the little kid's vagina with your cock shoved up in it. You imagine a cross-section with you shoved right up against the virgin fourth-grader's womb, and then you imagine one squirt after another of white fluid spitting out of your dick and directly into her uterus.

Bree moans and then squeezes you tighter with her arms and legs, pressing herself more firmly into your meat. You smile and bounce her a little more, and you begin to wonder again at why you haven't cum yet as you get a guilty sinking feeling in your stomach that maybe you weren't quite so close as you thought after all and feel like kicking yourself over having been mentally urging yourself to hurry it along.

'No,' your mental voice says, 'it's almost here,' and with that sinking feeling still present in the pit of your stomach you begin to focus on your balls witch have begun to clinch. Once again you egarly envision the white semen filling up Bree's virgin womb, urging it to happen before... well.. before you change your mind and try to prevent it. You kick yourself for being so horrible as to think this, but the visions of your semen wriggling inside her return and soon this thought actually becomes reality this time. Your groin begins to tense and you feel one pulse after another through your spasming loins.

It is almost curious how little fan-fair there is as you begin to fill Bree's vagina with your baby-goo. There was no fucking, you were simply holding still inside her from the start and gently rocking her. As you spasmed inside her, you kept gently rocking her and there is only complete silence in the house as not a word is exchanged between you. If you were a 3rd party observer watching this happen, you would never even know something had occurred. In fact, Bree doesn't even make any indication something is off. It may well be you are the only person, including Bree, who knows she just got her first internal semination from her own brother.

• Ok, you HAVE to find out if she was fertile
• Ask Bree how she's feeling now
• Inform Bree that you just came in her
• Mention it is Bree's turn to give you a dare