Need Help with Spline Control

Is there a way to make a 2D spline tangent to some other entity, like a line or plane, at a point that is in the middle of the spline, rather than just an endpoint?  The attached picture shows an example of what I am trying to accomplish (easily achievable in SolidWorks).  I can make a line tangent to a spline referenced in a different sketch, but I can't make it work with a line and a spline that are in the same 2D sketch, nor can I make a 2D spline tangent to a line that is referenced from a different sketch.  The only workaround I've found is to use two splines, but that introduces some undesirable changes in curvature continuity that wouldn't be present if it were just one spline. 

Note how the spline is tangent to the line in the middle where the red arrow is, and the curvature combs are nice and smooth.  It seems like there has to be a way to do this in Creo as well and I must be missing something; any help would be appreciated.