The girl tried to give him a breast-job while licking the glans, but she soon grew exhausted and sweaty.
"I'm sorry... Doctor... I... I have no strength left..."
"It's okay. I'll do the work."
Kars gripped her breasts and began to grind his meat between them. The heat from his body seemed to transfer to her, making her flush.
"Open wide. Drink my semen, and your body will improve."
The girl obeyed, watching the rod move between her tits. When Kars groaned and erupted, she leaned in to catch every drop, swallowing it all down.
"Doctor... I drank it all..."
"Good. Can you feel it? Your strength returning?"
"Yes... I feel better... but... it feels strange down there... I want your meat..."
She rubbed her legs together, staring at his still-hard cock.
"That's the next stage of treatment. You'll feel amazing soon."
Kars stripped her and spread her legs, exposing her virgin pussy.
"The doctor is seeing everything..." she whispered.
He rubbed his glans against her entrance before thrusting in.
"Ahhh!!" The girl screamed as the massive rod breached her. "It's too big... I'm going to break..."
"You'll love it soon."
True to his word, the pain soon turned into an overwhelming pleasure. "Ahhh! It's like you said... it feels so good! I've never felt like this!"
Kars hammered her cervix, and she clung to him, arching her back as her breasts bounced. He leaned down to suckle on her nipples.
As he reached his limit, he drove deep and filled her womb with hot cum. He stayed inside her, still suckling her breast.
"Ha... is the treatment over?"
"For now. You can even be discharged. But this treatment must continue for life to keep you healthy. You'll have to come to me whenever you need a 'refill'."
"Forever?" The girl looked thrilled. "I... I understand! Thank you, Doctor. If you need my hole, take it whenever you want. I'll even bear your children as thanks."
"I accept. I'll visit your home for your next 'check-up'."
"Yes! Please do, Doctor!"
"It's my responsibility," Kars smiled. "I'll make sure you and your future children are very healthy."