Summary:

Janet Drake gave birth to two healthy boys on the side of an active volcano in Ecuador during a dig. The midwife handed Janet her babies, and Jack pronounced their names to be Timothy and Jackson Drake.

Three years later, any evidence of Jackson Drake ever existing had been erased.

In fact, on July 19, 20XX, Janet Drake had given birth to one lovely boy named Timothy Jackson Drake.

OR

What if Tim had a twin, and what if nobody knew?

Ft. Brotherly bonding, a complete disregard for canon, a couple shenanigans, and a shit ton of reveals.