Making June surrender due to an instinctive reaction was the only way to stop the spell without hurting her. Noah just had to make her sea of consciousness aware of the power of his body to shut down her will to fight.
The helplessness felt in front of a being on a higher level didn't depend on the individualities. It was the result of the survival instinct that any creature had.
June fell on her knees after her centers of power stopped producing that massive quantity of energy. The sudden return of her Perfect Circuit to an average pace made her feel dizzy, and the exhaustion that enveloped her body made her legs lose strength.
Noah crouched and lifted her face as he caressed her. June was pale and appeared utterly drained, but she wore a satisfied smile as she examined her lover's body.