Samantha's eyes widen in shock and disgust at your suggestion, but she realizes with a sinking feeling that it might be the only way to avoid serious injury. She swallows hard, her face paling at the thought of what she's about to do.
"I... I understand," she whispers, her voice trembling. "I'll try to... to use my bowels to lubricate the dildo, to make it easier to take." Samantha's face burns with shame and humiliation as she admits this degrading plan.