https://stuffer.ai
Been giving this a shot both a few weeks ago and over the past couple of days, and it's gotten much better at producing AI fats than it used to be. Still outclassed by custom colab/local SD models using the newest BiggerGirls models, but for a free web implementation without registration and with a fast image gen pace, it's pretty decent. As a bonus, you don't have to spend eons dancing around arbitrary word filters like you do with the censorship hell bing's dall-e implementation has sunken into.
To start us off, here's some good results I got with various permutations of these two prompts:
>bottom-heavy SSBBW trapped in a narrow doorway, huge ass, huge hips, huge thighs, pear-shaped, sweaty, aroused, irritated
>sketch, princess daisy [insert scene/action here], huge belly, bloated belly, swollen belly, sweaty, aroused, blushing, belly noises