This almost fell off the page. :O
Here's a sketch to keep it from falling.
This unfortunate woman was just mushroomed only hours before her new form already started to produce spores. Barely used to her new form and already assaulted by completely new sensations from within her body, she can do little but feel it out as her bussom begins to fill and swell outward...
...and she isn't even past the initial stages yet.
For this sketch I used a smaller brush size then usual. I think it came out good.