Nervous about the risk, but there's an undeniable thrill about feeling of your Sister's cum in you

It takes a moment for everything to sink in, one moment you are trying to process the butterflies in your stomach sensation you get when looking up at your Younger Sister, and the next you hear the dreaded words 'I think the condom broke'. One side of your mind reeling from the prospect you might have deeper feelings for your Sister than you should, the other a cold icy feeling of dread that your defenceless pussy is overflowing with your Sister's potent cum. You numbly stare down between your legs, looking at your fingers that you just slid into your pussy and the sticky pearlescent fluid coating them.

"Mist, are you ok?" Lyra says softly, although her tone is calm, the expressions on her face are anything but. "Please Sis, say something," Lyra pleads her calm tone quavering as fear she's gone too far begins to fill her mind. For the moment you are too stunned to react, Lyra's words sound muted and distant, almost as if you were hearing them through a wall. The reckless confidence your Sister had been riding until this moment suddenly runs dry, tears forming in her eyes as fears of you cutting ties with her begin to take hold. "Please say something," Lyra begs, her voice quaking as she tries to hold back the flood of tears thinking she's gone too far and might lose you forever.

Suddenly the slight tremble in your younger Sister's voice cuts through the introspective daze you found yourself in. You quickly push aside your worries for the moment and pull your Sister into a tight embrace, holding her close to your body and running your hands up and down her back. "Sorry, just a little shocked," You reply softly.

"So you don't hate me?" Lyra asks softly, her voice still trembling as her emotions still run high.

"No, I could never," You reply softly giving your Sister a reassuring smile.

"You mean it?" Lyra asks swallowing hard and wiping some of the tears from her eyes.

"Of course, there's no sense crying of spilt milk, even cock milk for that matter," You reply in a joking tone hoping the awful joke might ease your Sister's mood.

Lyra lets out some soft laughter, between sniffs as she dries her eyes, her mood finally settling and her normal confidence slowly begins to come back to her. "Even if it was a big spill?" She asks softly a small wry smile on her lips.

"Trust me I can feel just how much you spilt and it's fine," You reply with a grin, you feel the thick sticky cum still oozing from your well fucked pussy, running down your thighs, although the more disconcerting feeling is the odds sloshing sensation deep inside your womb.

"But what if that spill leads to something unexpected," Lyra probes.

"Well I'm no expert, but couples who want to get pregnant can take months to manage it, So I think it'll take more than one leaky condom to knock me up," You say with a confident smile. "That said, perhaps a trip out to pick up a plan B, might not be a terrible idea," You add. "Just in case," You conclude with a nervous laugh.

"I don't think the town nearby stocks them," Lyra replies.

"Well, we can drive further out, find a bigger town where there is a bit more open to people having sex for things other than procreating," You offer.

"Maybe we could make a road trip of it," Lyra says with an excited smile. "Like a little vacation adventure," She adds excitedly as she reaches over and begins searching nearby towns and cities on her phone. "If we're willing to drive quite a long way we could even hit up Vegas," Lyra offers with a grin.

"The city of sin, very apt for our needs," You say in a cheery tone. "We can gamble, take in a show, get some food, maybe you can get us one of the really fancy rooms," You ask in a hopeful tone.

"Oh I think we can manage that," Lyra replies with a grin.

"One wonderfully debauched night in Vegas then up the next morning to get me the morning-after pill, sounds perfect," You reply with a grin.

"It's a shame, I was starting to warm to the idea of having a baby together," Lyra replies with a giggle, her eyes watching you closely for a reaction.

Your Sister's words resonate with you for a moment, a mixture of fear and anxiety about what would happen if you did get pregnant from this mishap and all the broody feelings you had towards the end of your marriage. You knew that a family is something you want from life, albeit a desire that you thought was very much on hold. Yet among the negative feelings about possibly getting pregnant with your Sister's baby, there's an undeniable thrill at how taboo that would be, which mixes with the desire to have a baby.

Your mind dwells on these forbidden thoughts for a few moments before a wonderfully wicked thought pops into your head before you shake it away. "Tempting, but maybe we shouldn't get too carried away," You reply with a giggle. "although that does remind me of something," You begin hesitantly rolling the idea around your mind for a little longer before committing to it.

"What's up?" Lyra asks with a broad smile, very much back to being her bubbly self.

"Well, since I'm already full of your cum and the potential damage is already done and we're off to procure a morning-after pill," You begin your younger Sister's eyes widen as she realises what you are about to suggest. "Well, there's not much point using condoms while we're away," You conclude.

"Best road trip ever," Lyra replies with a huge smile on her face.