He waits till her legs have left the ground in one of her periodic flailing kicks, and then he releases pressure on her head in order to swiftly rotate to the left.
The combination of releasing downward pressure and twisting his body with her right hand still squeezed tightly between his legs brings her head and shoulders up and forward, slamming the side of her face against his left flank, her chin colliding with the bony protuberance of his hip. Her arm now fully encircles and hugs his left leg.
He catches his weight with his right hand palm down, and reaches for her knife hand with his left. He is fast enough to catch her left wrist as it slips out from under her shoulder, and he applies as much downward pressure as he can to reform the pin.
Their bodies are tangled up now. Her legs are more free but her knife hand is now held directly. Her right forearm is still squeezed between his thighs, now positioned lower down and just out of reach of his genitals.
“Enough.” he says.