Mystery Mistress 5
Or, the third option, Bobbi. The downside is Bobbi is a talker. You thought she might be middle-of-the-road on the "kink" scale. Of course it was purely a guess. But, of the three girls you were considering, she knew the most about your situation. She was the most involved in your situation. She was the most likely to find out what was going on whether or not you told her, thanks to her damn curiosity. And, if you were being honest with yourself, you thought she had the best chance of being Mistress Fire. Sure, it would be a risk telling Bobbi your secrets. But it would be a risk telling anyone. So there it was. Monday morning, you were going to confess your darkest secrets to Bobbi.
Monday, you arrived at work feeling better than you expected. Very nervous, but you had a plan, so you felt a little bit of control. Mistress Fire said you needed to have this conversation on Monday morning, but she didn't specify the deadline. You saw no reason to wait, you were going to march in and immediately pull Bobbi into your office and get it over with.