This story contains many scenarios that are not mostly connected to each other and anything goes as long as its about growth (and shrinking goes too), weight gain, bbws and so on. (no furry, transgender and so on. No giant males, either.) Choose a scenario involving size-changing and bbws.
Erotic and sexual content is okay, as long as this is rated R mainly because of those instead of extreme violence. Don't make this a story about gore, ok? Lesbian content is also okay and so are multiple giantesses (Thin girls/giantesses are okay, if there is a fat one present).
If you're taking on the growth scenario, don't make the girl grow miles high and 2000 pounds fat (in scale) right away, unless if its just one of the paths or kept away from the beginning. Also, don't make an ending before the 19th chapter of a storyline. Of course, going over that is recommended. Especially if its a storyline with potential.
If you have got an idea for a storyline but every chapter beginning a storyline has been used, feel free with putting a chapter in the middle of a story like "taking a break from the current storyline, we can take in a new storyline."
And the options would be like
1) Go with the current storyline.
2) Start a new one.
Here is the yahoo group for this:
http://groups.yahoo.com/group/bbw_gts/
This is the continuation of the first group:
http://groups.yahoo.com/group/bbw_gts2/
There is some material there now.