Akira cums inside his mother

With a final, solid thrust, Emi felt Akira press his body hard against her. With a loud moan, he fell over her, his body fully covering her as she laid on the desk. She felt his cock pulsing inside her and felt the warmth of his cum flowing into her body. He moaned with each pulse as he released inside her, and she relished the feeling of knowing she'd pleased him better than any woman he'd ever been with.

Afterwards, they both laid there for a long moment, letting their breathing calm and their hearts return to a resting beat. As Akira pulled away from her, his cock fell out of her. She had a brief moment of disappointment as she realized their lovemaking was over, but as she did, she felt the dominant part her mind recede back to where it had always been, with her hidden desires locked away. She no longer knew her son's thoughts and desires, and as she straightened herself up, her eyes fell to the book.

It was still open to the title page, but the inscription and the symbol were gone. There was no writing in the cover and instead, she found herself looking at a regular, first edition copy of “Nami-ko” by Rouka Tokutomi. Somehow, the book had changed, and now she had no evidence for why they'd done what they had done.

“Mother?” Akira said, his voice confused.

Turning to her son, she looked at his face. She had no explanation for him, and she could not hear his thoughts anymore, but she could not deny what she had felt and how much about him she had known. And she couldn’t deny that she had felt something for him for a long time. While she was suddenly disgusted about that she'd taken her son's cock inside her, she was glad they’d finally gotten that out of their system.

As she encouraged him to get himself back together, she knew that when they left the library and returned to the world, there would always be something different between them. She knew they wouldn’t deny their desires again in the future.