"Is this the first time he's contacted you?" Isabelle looked Sherlock in the eyes searching for any kind of answers she could get, she kept her hands in his as if she were afraid that if she let go something horrible were going to happen to her and he was acting as if that were the case as well. Isabelle had never seen Sherlock in such a state of what she could only describe as disorganization, it scared her seeing him that way, so worried, so out of place to how he usually was. Whoever this was sure knew how to get under Sherlock's skin.
"I don't even know who it is Sherlock." She replied keeping her eyes fixed on his. When she finally let go of his hands her own were shaking the anxiety in the room was unbelievably high between everyone who was there. When John got there Isabelle was sitting in Sherlock's chair her hands gently clasped together sitting in her lap, John glanced over at Sherlock before going to her kneeling before her. She barely registered that his fingers were on the pulse point in her wrist, he was checking her vitals but why? "Do you feel alright Isabelle?" John asked putting his finger up which she naturally followed, up down, left right.
"I feel fine." She replied softly glancing over at Sherlock, he still seemed unbelievably on edge, she wanted to do something for him ease the anxiety he was clearly feeling, she just wanted to reach out to him, she wasn't sure what was coming over her. "Just the letter then?" John asked directing the question at Sherlock and Molly who seemed to both just nod.
"But why did he send it to Bella?" Molly asked looking at her friend. "Perhaps, for whatever reason he thinks Bella is a good way to get to Sherlock." John suggested causing Isabelle to shift her gaze from Sherlock's back to her hands.
Bella had eventually fallen asleep curled up in Sherlock's chair, while John had returned to Mary and Molly had returned to her husband Isabelle stayed with Sherlock feeling that her leaving the flat, leaving his sight wouldn't help the matter as it seemed the letter being delivered to her personally was the cause of the distress between everyone. So, she stayed where she was drifting to sleep at around midnight.
"Miss me Sherlock?" Moriarty chuckled walking into the room, he assumed that Sherlock had been expecting him since Isabelle had received the letter. "You've had to have missed me a little bit." He continued moving towards Bella keeping his eyes fixed on her tiny sleeping frame. "So what is it about her? You have to tell me." Moriarty went over to her picking up a piece of her red hair holding it between her fingers chuckling at the reaction Sherlock gave though Bella didn't stir at all.
"What makes her so special, that she can make even your blood run hot? You never looked at the others that way. The stolen glances, its sickening really." He clicked his tongue putting his hands in his pockets catching Sherlock's glare. "Falling prey to your human instincts? How boring you have become Sherlock, how...ordinary. She is pretty I will give you that, you might has to share her with me." He chuckled slightly, now he was just tempting a reaction out of the detective.