Inflating both sides of a vertical surface

Hello,

I was trying to create a cushion out of a curved, flat, vertical surface without much success. I combed through many discussions surrounding Kangaroo and was able to salvage some components from different definitions. However, the end result is nowhere close to what I have in my sketch. Hopefully, you guys can give me some pointers.

The curve is referenced in from Rhino and then used as a centerline for the cushion. I was only able to inflate it on one side.

In addition, I could not create a surface out of the output points from Kangaroo. The resulted surface seems to fold onto itself although I already have the expression for input U to be x+1.

Here are my 2 questions:

1) How can I inflate the mesh from both sides?

2) What is the best method to create a surface from these output points?

I attached both the Rhino and grasshopper file here. You will need Kangaroo 2 to open the definition. Thanks so much!