Bella was in her room, she was living with Allison so she used this opportunity to keep an eye on her because there were not many that could get this close to her without her guard being raised.
Allison was still at work but Bella had closed early as there wasn't much to do outside.
She didn't like the thought of it but she understood that something could happen at any moment.
She needed all the information she could gather and this was why she made the bold move of entering her room.
They both respected each other's privacy and this would be a direct violation of the rules they had in place.
Bella stepped into her room and it was a lot different than she had imagined but there was nothing implicating.
There was no way that Allison would keep evidence out in the open, to begin with, she would be a lot smarter because while this might be her house, she had limited control over who came in or out.