wow cool! Your game is very good, excellent even. I haven't played a text adventure this good since I played Abducted+ by ToshDragonash, Fatty Text Adventure Game (FTAG) by Noone_fa, or Yaffaif by dingotush. With a bit more work and time invested in development, I think your game could be as big as those one. If you haven't played the games I listed yet you definitely should, they are great games and you may get inspiration for ideas to add to your game.
I had another idea, what if when the love interest becomes immobile, the location it happens at influences where you meet up with them going forward. For example, if they become immobile at your house they now live in a room at the house. Or if they become immobile at work they are shipped to a obese care center. Things like that could make the game more interactive.
Maybe, if you fatten up more than 2 towns women to morbid obesity or immobility the demographics of the town could shift. More chubby and fat women appear in town, and more restaurants offer fattening food with large portions instead of the normal fare. If you fatten more than 4 the town starts having more obese woman appear and businesses that cater towards fat people show up as options.
By the way, do you have an idea on when the next major update might be released or do you have no release schedule currently?