William sat in the living room with Albert - the eldest Moriarty sibling, and Louis - second youngest sibling. Aside from the brothers, there is also Jack, Moran, Fred and Bond. They're talking about the next step of their 'plan'. Of course, William and Albert are the heads of this plan, yet they wouldn't go as far without the others.

You though, as the youngest Moriarty sibling, are not included in the plan. Hell, you barely know about it, if you know about it at all.