The Moriarty Tradeoff

Mara Moriarty... the youngest. Cunning, sharp, dramatic, and always quick with a remark, Mara would do anything for her brother and to keep him safe, and she promised that to their dearly departed parents.
And now... it has come time for Mara to act on that promise. Her darling Jimmy was in the custody of the government and apperently, one of the Holmes brothers.
So Mara has to step in.
But she didn't quite expect her plan to go like this.
⚠This doesn't really take place in any of the episodes so sorta a AU I guess lmao⚠
• I don't own any of the characters besides Mara
• another fanfic yeet yeet