Yes, he joins the hivemind

Her brother waking up to something warm and wet at his crotch, and a strange feeling in his private parts.

Blinking awake, his hips moving involuntarily. He feels confused. Different. His head hurts.

His hands find more warm flesh, curves on curves. Taking hold. Trying to get free.

It feels confusing. Wrong? But good. So very good. He could do this forever.

It felt wondrous, perfect, as the signal entered his mind too from his sister's phone, he saw the world how it should be from their saviors.

She was riding him like a seasoned pro, grinding her swollen cunt against his fat horsecock, the whole bed shaking and rocking back and forth.

Her swollen, leaky tits reached all the way down to his face, as he involuntarily latched on, teethy against a fat, rubbery tit, causing his sister to yelp out in pleasure.

Slamming her fat, bimbo teen ass down, she moaned out and drooled with a blissful ahegao face~

Being remade, refreshed. Emptied out for the knowledge to come and the new civilization that would be built.

Pulling at her nipple with his teeth as he bucks up into her, hands gripping her ass hard enough to leave indents.

That's when she felt it, that glorious release, as his sperm entered her womb.

Finally, she was fulfilled.

She quivered and shook hard, grinning like a maniac as she furiously grinded her needy cunt against the base of his monstrously large cock.

His balls churning, as cum shot out, her lovely, plump, fatty, remolded body taking his seed as she looked heavily pregnant already~