Hey there! Sorry for the delayed response!
- For the remaining endings, a likely bet would be the Halloween, Christmas and Easter events, since they're inaccessible for most of the year.
- To unlock Hunk's "Fat fuck" image, you have to do their "Get destroyed" sex scene while incredibly high weight.
- There's no upper limit to player weight (Since it's fun seeing how high players will push it), but content stops getting more variants around 3,100lbs.