Molly knew that she was "nesting". Sherlock has read it in a book, something about how a mother feels the need to make things perfect around the home or in Molly's case, 221 B since Sherlock would be the main caretaker after she goes back to work.

They would buy a new home befor she reached her third trimester, Mycroft insisted on it. But while she cleaned out room after room of 221B she was only 5 months along and getting too sweaty and too tired to move around too much. She had cleaned his old bedroom, left a window open to air out the space of all the old smells. She had gone up to Johns room that Sherlock insisted on making into a nursery for the baby while he worked. She got everything either set up for storage or in a neat pile in the closet.

This has been going on for 4 days now and while she made it up the first set of stairs, she couldn't fathom going up one more. Rubbing her now obvious belly, she moved to sit in Sherlock's chair, but it wasn't doing anything for her back.

"I need my own chair. Something comfy and plush." She whispered to herself as she went to get a pillow from Sherlock's room and went to stuff it in Johns chair, but she was poked by something small and yelped and backed away.

She looked at the chair, moved slowly to pull out the bottom cushion and a simple used needle was staring her in the face.

Molly sunk to the floor. Staring at it. The energy she had been storing up was gone. She just sat there, until she heard someone coming up the stairs. Too fast for Mrs.Hudson and John only came around with Sherlock so she knew that it was him.

She sat there for a long moment before he made his entrance. "Ready for lunch?" He asked and showed off the bag before going to the kitchen and looking around. "Molly?"

He walked back out when she didn't move or join him and he walked closer, worry etched on his face. "What's that Sherlock?"

He looked at what she was looking at and he just stood there. Molly got up after a few moments and rubbed her belly before walking up to him, and smacking him once, as hard as she could.

"Get out." She told him and he opened his mouth over and over like a fish as she moved towards his bed room.

"Molly!"

"Go Sherlock! You used drugs! Recently! Are you kidding me? I'm pregnant and I thought we were happy and you were going to be okay." She let a few tears fall and she shook her head and Sherlock took off after her. "No!" She shouted, making him slow his persuit but he didn't stop.

"Molly-"

"Leave me alone Sherlock. You can't handle this you should have just told me!" She shouted and she started to get even angrier when he wouldn't leave, so she decided to show her anger.

She picked up a magnifying glass and threw it right at his face, he ducked quick but the glass shattered and he looked at it before looking back at her.

"Molly that wasn't mine." He tried to lie and she gave a fake laugh before shaking her head and moving to grab something else to throw. "Don't-"

"Who else uses needles Sherlock? And you used Johns chair to hide it? Are you serious? Did you not think I would clean his chair?" She have a dry laugh and she started to cry harder.

"Molly it's not mine. I would never use drugs again. I vowed-"

"So the needle is so old that it's been right there for over two years?" She asked and crossed her arms.

"No. It's not mine new or old! I have never-"

"It's in the flat Sherlock! If it's not yours, not mine, John doesn't use drugs and Mrs. H doesn't use anything harder than her soothers... so whose is it?" She asked him and he waved her to sit down and when she did and started to cry softly he got down on his knees slowly in front of her and grabbed her hands.

"It is not mine. We had a woman come in the other day, John and I did, and she wanted us to test the needles her son used because he was getting worse. He had diabetes and she was sure someone was messing with his insulin. She had an entire pack of them and the bag broke on Johns chair."

"Then get John here." She accused, and she saw the hurt in his eyes when he realized that she would never just take his word and he nodded before getting John on the phone and agree to stop by right now.

"She found out her son, who had a large trust fund had created a will for his ex girlfriend to inherit it all. And his friend was messing with his insulin because he was now

dating and expecting with the ex." Sherlock told her and Molly just kept rubbing her belly as he went to wait for John.

Half an hour later she came out of the room and John was saying his goodbyes. He left with a worried look and Molly went to sit down next to Sherlock who was simply

looking at the needle set now on the table.

"I understand why you would think I would use... but to need proof when I deny it-" he shook his head and sniffles and Molly looked up and over at him and saw his hurt displaying all over his face.

"I was scared Sherlock. I poked myself and -"

"What!" He shouted and she lifted her hand to show him the little spot and he shook his head before getting up. "We have to go!" He told her and lifted her, tugging her, getting their jackets and he rushed down the stairs. "Johns already gotten a damn cabbie." He grumbled and came back to see to her coming down the stairs.

"Why do we need to go somewhere Sherlock?" She asked as he started to hold her close as he hailed another cab and demanded to go to Bart's.

After another 20 minutes Sherlock had her sitting down and giving her a shot of what John had made for the boy that had been effected.

He told her to get an appointment for the baby today and she got on the phone right away and was told to come right away.

Sherlock escorted her up stairs and they got into a room right away and Sherlock was pacing as they got the machine together to get everything checked out.

The ultrasound was going when Molly started to cry. Sherlock came toward her head instead of peering over the doctors shoulder to check things and kissed her temple when they had a bit of trouble trying to find the baby's heartbeat since the baby seemed to be "hugging" her spine and not 'usually' facing the belly.

"He should be fine. I see him moving, just slightly, he-"

"It's a boy?" Molly asked and the doctor seemed pans then looked over their chart and started to apologize that she hadn't seen the note they didn't know the gender.

"It's alright." Molly whispered and looked over to Sherlock. "He can be just like his daddy and I will love him no matter what too."

"I love you." Sherlock told her and she smiled.

"I'm sorry for assuming Sher"

"Nonsense Molly. Roles were reversed we would have had a fight too." He issued her temple and they watched their son turn just slightly on the screen when she sat up and the heart beat echoed through the room and she smiled wide.

"You're so helping me clean the rest of 221 B." She told hi and he nodded and kissed her lips now.