Looking to know if there is any interest, but for a while I was working on a mod for
Artificial Academy 2 that had basic BE functionality. It was more of a pet project of mine than an actual mod, but I could muster up a workable version if there's enough people that would like it.
Basically it was just a module like the ones made by the modding community, but it had no story, or real tangible gameplay elements, but girls would grow bigger periodically (faster whenever they ate), and you could revert some of the growth (simulating being milked). Girls also got hornier the bigger they got, somewhat.
It's a bit of a mess, and it requires a certain amount of work unless you use the girl cards I already adapted for it, but in the end you do get BE in the game, and I personally enjoyed it so maybe others would. I've since abandonned the project, but I could at least make it useable by others, and with enough interest maybe start working on it again.