As they headed to the precinct, Sherlock was acting more twitchy than usual. In the back of the cab, Joan tried to get the conversation flowing. She appeared to startle him and first, but then normal attire could presume until they made it to work.
Sherlock was right, today was going to be hard. Joan looked gorgeous and he couldn't find her any more attractive than when she was working. He decided that he needed to be more like himself and ignore Joan for the day, much to Joan's dismay. Sherlock went and cracked on with the minor case at hand.
After about 10 minutes of silence and working on the case a tall, dark and hunky man strolled in asking for Joan. "Oh my goodness, David!" she squealed, trotting out the room holding onto his arm. Sherlock watched them intently through the window. She laughed with him, following it through with a playful tap on his arm and wore a smile that seemed to stretch from ear to ear. She turned to see Sherlock looking through the window, thinking he was agitated that she'd ditched her work. Joan retrieved a piece of paper and a pen from her handbag and scribbled down what appears to be a number and handed it to him before giving the tall, handsome man a big hug and departing back into the room. No words were spoken, but Sherlock's irritation was clear.
It took Sherlock slightly longer than usual to crack the minor crime which appeared alarming to most of the team. There was nothing that Joan could do, so she decided to check her phone, before giving a very girly giggle and then tapping away at her phone. In the next few minutes her phone went off at least another 3 times. Joan, as well as the rest of the team, kept silent and watched him get more and more wound up and seemingly more and more agitated. After a painfully silent 10 minutes, Bell thought he should check and see if Sherlock was okay as he kept muttering away to himself. "Sherlock? You alright"
"Yes? What? Yes, yes I'm perfectly fine" he managed to stumbled out.
"Are you sure? You seem a bit jittery?" continued Bell.
"Honestly, yes, I'm perfectly fine. This case, yes, I'm just, yes I'm fine." he replied.
"Sherlock, it's okay if you need to stop we underst-" Joan tried.
"I said I'm fine, Joan." He protested very harshly before storming out of the room.