It's pretty obvious to me that she got off on being that size too. I do think bread the end she started to develop health issues but I don't think it's as bad as other people think.
My reasoning is you watch how they did their stuffing videos... It all felt very cartoonish. Personally I think he developed a lot of feeding fetish kinks from watching Cartoon Network and Nikoldean. The way in which he tried to stuff her by shoving whole sandwiches down her, the way she sticks out her tongue for more, the way she is angled and fed. It all screams cartoons fetishist. I firmly believe it was all an act.
I do hope that she's okay though.