He puts it on her to get him hard.

Trapped in a squat on the carpet, Lara stared up at Glenn and his cock. It looked like it always did, but knowing literally nothing she could do would stop him from being able to fuck her throat, her pussy, or... oh god, no.

She leaned forward, hoping to get things started, but he was playing things coy. He wasn't even hard yet. Then again, she did enjoy the feeling of him hardening in her mouth. It was a quiet power she held over him.

He stepped forward and into the awkward ring of her arms, linked to the bar at her ankles. He hadn't showered, and the sweaty man smell of him was normally atrocious, but as she realised again that she physically could not complain another wave of arrousal hit her.

He stuck his cock through the ring and she felt it land against the back of her tongue. Another moment of realisation hit her. The ring went well past her teeth. She wouldn't be able to use her tongue. The only way he would cum would be by fucking her throat until he decided he was done, and no amount of tongue tricks could change that. She was helpless. She moaned.