The Doctor led Jack over to one of the beds helping him to climb up on it. Jack thought about slapping the Doctor's hand away as the Doctor reached to unbutton his shirt. While Jack appreciated the help, he wasn't completely invalid and could remove his own shirt for Martha to examine him. The pain was still there and why it wasn't as sharp as it first had been it worried him that it wasn't going away. He laid back on the bed holding the Doctor's hand as the Doctor fussed over him.
"I'm sorry I ate the last of your peanut butter, then left you behind. I won't leave you behind ever again Jack." He paused to lean down and kiss Jack on the side of the head. "Were you hurting this morning and didn't tell me because you were mad at me? You should still tell me when you hurt. I could have taken you with me to go see Martha when you were mad at me for eating the peanut butter. Where is Martha?" He paused to look around the medi-bay, not happy to see that she was in the medicine cabinet. "Martha, Jack needs you over here."
"I know," Martha replied as she grabbed two syringes, a painkiller, and a Time Lord friendly sedative. She didn't want to have to sedate the Doctor, but if he didn't calm down she wasn't going to have a choice. She sighed, her day had started normally enough until the TARDIS landed in her office. She had been worried something was wrong when the Doctor came bounding out by himself. Her worry quickly turned to disbelief than laughter as he complained about Jack and his peanut butter. Now she had come full circle and was worried again due to Jack being in pain.
"Martha," The Doctor whined. Martha closed the cabinet and came over to them.
"Doctor you need to calm down and take a seat," Martha told him calmly.
"I can't Jack needs me," The Doctor argued. He gripped Jack's hand tighter as he stared at Martha.
"Alright, I will give you a choice. You can either sit down and calm down or I am going to sedate you so that you don't put yourself into preterm labor while I try to figure out what is wrong with Jack," Martha informed him. She patiently counted to ten while she waited for him to make a decision. When he stood there glaring at her still, she pulled the first syringe out of her pocket along with the sedative. His eyes narrowed as she began to fill the syringe.
"Sweetheart please just sit down," Jack begged him. The Doctor glanced at Jack. He released Jack's hand long enough that he could pull a chair over next to the bed. Sitting down in it again he took Jack's hand once more. Martha capped the syringe returning it to her pocket.
"Next time you don't get a warning," She told the Doctor as she pulled on a pair of gloves. "Jack I am going to gently palpate your abdomen. I want you to tell me if it hurts."
"Okay," Jack agreed. Martha gently checked his stomach, the closer she got to his pelvic bone the more his breath caught and he writhed slightly under her touch. He didn't tell her to stop, though, so she kept going. It was when she pressed right above his pelvic bone that he cried out, lifting his back up off the table as he tried to get away from her touch.
"I'm sorry," Martha cooed.
"What is it, what is the matter with him?" The Doctor panicked as he jumped to his feet.
"I think his hip bones are separating in order to make room for the growing baby and prepare his body for delivery," Martha explained as she moved to retrieve the ultrasound machine. As she did she had the TARDIS scan his hips for her.
"It's too early. He isn't ready to give birth yet. Martha the baby can't survive if he gives birth now," The Doctor rambled. He held Jack's hand even tighter afraid that he was going to lose his daughter. Jack had finally grown to accept the baby that was growing within him, it wasn't fair that he was going to lose her now.
"Doctor breathe," Martha told him calmly. "Just because his hips are starting to separate doesn't mean he is going to give birth. In fact yours could start any day now as well. From what I was reading it typically happens between the fourth and fifth month of pregnancy. So after I finish examining him I am going to take a look at your hips and see where you are at."
"I can't have mine separate now. I have to take care of Jack. He needs me," The Doctor paused to glare at Martha as he felt a sharp prick in his arm. Martha emptied the syringe, pulling it out.
"I didn't give you a strong enough dose to knock you out, but I suggest you lay down and relax," Martha said. She capped the syringe, turning around to throw it in the used syringes bin. When she turned back around, she found that the Doctor had listened to her, except that he was laying down with Jack, pressed almost fully against him. Martha shook her head. Rather than make him move, she pulled the ultrasound machine around the bed hooking it up. Squirting the cold gel on Jack's stomach, she checked on the baby making sure that she was alright. The twin hearts were still beating strongly and she was growing properly.
"How is she?" The Doctor asked with a yawn. Jack lifted his arm wrapping it around the Time Lord. The Doctor curled further into him.
"She is healthy and strong," Martha answered. She pushed the ultrasound machine away, turning to look at the monitor. The scan the TARDIS had taken was on the screen and she could see hairline fractures down the middle of Jack's hips. A moment later the screen changed and she could see that the Doctor also had the beginnings of his hips separating. He wasn't as far along, but he would definitely begin to feel it in the next few days.
"See these cracks Jack?" Martha questioned as she turned the screen back. Jack looked at it. "That is your body getting ready to make room for the baby. It should take about a week, and I am sorry, but the pain is only going to get worse while it happens. The good news is the Doctor has painkillers that will reduce the pain down to a mild annoyance. We can't take the pain completely away, in case something goes wrong, but I can make it tolerable."
"I don't need pain medication at the moment," Jack informed.
"You should take it if you need it," The Doctor told him, kissing him softly on the cheek. Even if Martha didn't give the Doctor a high enough dose of sedative to knock him out, she gave him enough to be sleepy and cuddly. It was only a matter of time before he fell asleep.
"I will when I need it, sweetheart," Jack responded. He kissed the Doctor back then looked at Martha. "What about him?"
"His hips have begun to split as well, but he won't feel it for a few days. I want the two of you to rest and I am going to call UNIT to let them know that I need to take a week off." Martha pulled the blanket up around Jack and the Doctor tucking them into the bed. "Do you need anything before I go?"
"Peanut butter?" Jack wondered. Martha chuckled going to get one of the jars from the bag. She handed it to him and then stepped out of the medi-bay. Jack opened the jar, digging his fingers into the gooey substance. He moaned in happiness as he cleaned it off his fingers, then stuck them back in. He offered the next taste to the Doctor, taking delight as the Doctor licked the peanut butter. Not caring he was making a mess, the two of them happily made their way through the half the jar before the Doctor drifted off to sleep.