How to blend animations (in animation blueprint) with Alpha value more then 1.f?

Can you blend between 2 animations in animation graph (animation blueprint) with value higher then 1.f?
So animation would be further then key?
Like if bone was in position 0.0f at animation A and 3.f in animation B and you can blend A and B with alpha=2.f so blender bone will be at position 6.f?
(Like shape keys where you can blend more then was baked.)

C++ or blueprints.