Sherlock and Joan-Season 3

This is a continuation of the last story but is set about four months after.

Joan woke with sunlight coming through the window, it was beautiful. She looked over and saw Sherlock's half of the bed was empty. She put on her dressing gown and went downstairs.
'Sherlock?' No one answered, he must be out. She picked her bag up off the table and checked her phone, there was a text from him.
Sorry i'm not there, Gregson needed a hand with a case. Make it up to you tonight. Love you.
She smiled then went into the kitchen to get some coffee. She went and sat down then she got a call from her mum.
'Hey mum....

“Stay,” he said.
That was the second time Joan Watson’s world had stopped in her whole life. She was about to leave Sherlock and move on to another client, and she had been in that situation thousands of times- the fact of leave a client and then go to another was common for her, it was a routine. But for some strange reason, she couldn’t leave Sherlock so easily. She had become a way attached to him, they were friends? Joan wondered, but then she remembered that “Sherlock Holmes doesn’t have any friends.” She couldn’t help herself and imagined how a day without Sherlock could...

Irene got off the plane and hailed the first taxi she could. She sat in the back seat and thought about her plan...and this time...Sherlock would not longer be an exception.

Sherlock woke to the sound of Joseph crying, he crept out of bed and went into his room.
'Hey...' He picked him up. 'What is it?' He took Joseph back into to see Joan, he layed him down on the bed in between them. Joseph raised his hand and almost smacked Joan in the face. Sherlock couldn't help but laugh.
'Hey!.' She looked down and saw Joseph. 'Oh...It was you was it?' She began to tickle him. 'Was it you?' He began to giggled....

Sherlock woke early and went into Joseph's room. He stood over his cot and watched him sleep. He took one of his hands in his, he was so small. He looked out the window at New York, thinking about the trail ahead of him. He thought he'd be around to see him grow up, it looks far less likely now. He didn't hear Joan come in.
'Hey, it's early.'
'I couldn't sleep.' Joan looked down at Joseph. 'Been thinking about things.'
'Sherlock, you have nothing to worry about. They jury will see though her lies.'
'We hope.' Sherlock picked him up. 'I'd hate to leave you two.'
'You won't.' Sherlock smiled at her...