Scale image between two given points: how?

Hi all,
I plan to dynamically scale my image between two given points. So: I have this image and I want UE to set its scale so it stretches but fits between point A and point B. No matter where I set those points, I want this image to follow and stretch or compress. How to do this?

EDIT: SOLUTION FOUND
Quite simple, wonder why it took me this long. Guess I’m getting old.
To the matter at hand: I have the base distance between my two points. That is when the image is not stretched. At every time either A or B moves, I calculate the distance (be it a simple subtraction or a Pitagore’s thesis, hope I did not butcher the english phenomenon too much). I give both of these an ABS, then I divide the actual distance by the base distance. That being said, I create a Vector2d (in my case) out of the float by keeping the X scale at 1.0 as I need the Y to be modified. I then apply a set render scale given the vector and voila.
I leave it here in case someone else would need it.