He does

As Makoto's head bobbed up and down mechanically, John reached down and cupped her chin

"Activate suction mode" he commanded.

Her head briefly released his dick

"Suction mode: activated" she droned, before opening her mouth again and starting to inhale deeply.

She wrapped her lips around his dick again, and this time her lips puckered, her cheeks sucked in, and her eyes went wide as she constantly sucked in with her mouth.

Of course, she was breathing out through her nose as needed, but still, it felt like he was being sucked by a human vacuum cleaner.