There were many benefits to a predatory genealogy. One of them was a much stronger genetic line. Where interbreeding was a dangerous prospect for most other family trees, yours was free from the threat thanks to the unique heritage that already lent itself to your naturally impressive physique. It wasn't unusual for members of your bloodline to marry or fool around with their closest relatives, and right now, Elwyn was looking too good to resist.

You dropped your pants, causing her eyes to go wide as she got her first good look at the bulge that you'd been struggling with so far. Her lips parted in breathless surprise, unable to look away as her expression asked the question she couldn't find the words for.

"It was the girl I took back to my room last night." You explained. "The blonde one. Thought she'd drained me enough that resupplying my reserves was a fair trade off."

Your words had the intended effect. Her face went crimson, both unbelievably embarrassed and unbelievably excited to hear about your most recent conquest as you were getting ready to make your move on her as well. Her lips close tightly together as your cock, rock hard at this point, approaches her lower regions, teasing her already-soaked entrance with the tip.

You don't push in right away, taking a moment to lean forwards and kiss Elwyn passionately while running a hand through her raven-black hair. She is hesitant at first, but as your tongue works to pry her lips apart she returns the gesture in kind, meeting you halfway and sinking into the embrace for several pleasurable moments before pulling away breathlessly.

"Please..." She urges, panting and almost desperate.

"Please what?" You ask coyly, pretending you don't feel her inner warmth grinding against your member with the urgency of a forest fire.

"Please... fuck me!"

You needed no further encouragement, sliding your dick into her slowly but steadily. Her moan of pleasure was drowned by your mouth as you kissed her again, feeling her lower walls expand around your invasion. It was incredible. With your sensitivity already through the roof thanks to the massive load in your balls, the tight wetness of her embrace was pleasurable in a way that went beyond words. One hand pressed against the back of her head, drawing her further into the kiss while the other cupped her butt, helping to piston her body against yours as the both of you picked up speed.

Elwyn responded in kind, nails digging into your back as her legs wrapped around you, refusing to let go for anything. Both of you knew that this wouldn't last, you being on edge since the start of your fun, and her still being incredibly sensitive from the lingering effects of her recent climax.

Even so, you refuse to let yourself go completely. Every ounce of self-control is dedicated to ensuring that you last as long as possible, driving yourself into her again and again as wet smacks fill the air and tongue embraces your own. It isn't until you feel her pussy clamp down on you, practically screaming into your mouth as she looses all control of herself, that you're finally pushed over the edge.

The blonde girl in your sack becomes a tidal surge, erupting from your dick into the body of your younger sister, cascading into her walls and filling up her deepest regions. Your vision goes white, starburst explosions dotting your eyes as you unload one wonderful girl into another, feeling the mind-blowing pleasure of your balls shrinking as Elwyn's stomach expands. She grips you tightly, refusing to let you move back even an inch as your previous occupant is evacuated directly into her womb.

For several wonderfully long minutes, the two of you hold that position, feeling her midsection swell and rub against your abs as you fill her up. It isn't until the last dregs of your former lover disappear into her depths that the two of you finally part, gasping for breath and barely able to move in the afterglow of your joined ecstasy.

Once you do work up the will to move though, you pull your sweaty sister and her bloated belly to your side, earning a murmur of appreciation from her as you draw the sheets over the two of you. With her body pressed against yours, you both settle in for an afternoon nap, swept along by her girlish scent and comforting touch as consciousness drifted away.