Apparatus and systems of interior window framing

An apparatus for finishing and framing an unfinished window opening having a width, a height, and a depth, the apparatus ensuring that a finished and viewable interior appearance of the window opening comprises a desired angularity having a desired height, regardless of an undesired angularity of the unfinished window opening, the apparatus comprising:

• a substantially rigid interior decorative molding having an exposed surface and a back surface, wherein the back surface is configured to abut a front wall surface of the unfinished window opening;
• an interior window jamb support having a proximal end and a distal end, the proximal end being interconnectedly coupled with the substantially rigid interior decorative molding by a tongue protruding from the window jamb support and being received by a groove in the back surface of the interior decorative molding, and the distal end directly abutting an interior surface of a window frame;
• and
• a resilient material interposedly positioned between an innermost portion of the groove of the interior decorative molding and the distal end of the tongue of the interior window jamb support, wherein the installed apparatus provides a finished window opening having the desired angularity with a desired width and a desired height, and wherein the resilient material enables a snug fit between the interior decorative molding and the interior window jamb support.