Question How to stretch 2D sprite in a fisheye-type effect using bones?

Hi I'm new to 2D bone rigging and had a question about non-uniform scaling.

I have a 2D sprite that lives on a texture sheet (from TexturePacker), and I was wondering, is it possible to scale the sprite from the centre such that the stretching is strongest at the centre, and stretches less towards the edges?

I drew a little drawing attached here to show what I mean (sprite represented in red). Is there a way I could attach a bone to my sprite to achieve this (in order to animate things like an expanding lung for instance)?

Thank you!

https://imgur.com/a/XdVijxN

 

For those wondering, one solution was to add one bone in the middle to scale via animation, then a few more bones to simply constrain the image at the edges (see image, bones drawn in purple)


https://imgur.com/a/75TbQlP