Too lazy for a diet

Johnny was a regular graduated university student who lives with his single mom, Valerie, a little carefree lady who currently is having a little problem with her weight,  despite that, Johnny loves her and helps her doing exercises and goes out together to do jogging, things that Valerie didn't like much because of her lazy personality, but one friday, after Johnny's graduation, he was going out to a party to celebrate, leaving Valerie alone for the rest of the day. While she was alone she checks her weight and got concerned after she saw how much weight she has, worried that her son would increase the jogging hours, but while checking her phone, she found a very interesting site with a possible solution of her problem.

This comic has 642 pages

Fans of shrinking moms would be happy with it