What kind of mom reaction is?

Futa mom and futa John

The air crackled with sexiness and musk. A silent challenge hanging between mother and son. Two colossal futanari now stood (or knelt, in John's case, as he savored the final throes of his transformation), their magnificent organs dominating the lmaster bedroom.

John, now a petite, athletic futanari, rose to his full height. His 260 cm (8 ft 6 inch) penis swaying gently before him. Its sheer length and thickness were breathtaking. It is easily twice the size of his mother's already monstrous 130 cm shaft. His watermelon-sized testicles hung low, heavy with an unimaginable volume of cream-like semen. While he felt his newly formed vagina pulse with a subtle, internal warmth.

His mother initially stunned into silence now regarded him with a complex mix of awe, shock, and a grudging respect that warred with her own fierce pride. "Impossible..." she whispered, her own massive cock twitching as if sensing thesuperior rival. "Wait...you have always have bigger one....why this then feel like a new challenge" Her eyes lock on John's front package but shake her head and "Says. Masturbating must mix my thoughts."

"Only a futa can beat another futa, right, Mom?" John’s voice, now a rich, slightly feminine tone, resonated with confidence.