Thats probably because they didnt tl the chapter... in the last chapter fatty already stated that he wants to trade another woman for noona. And in this chapter fatty got help from mc to get in shape to get the noona. Dont listen to people on discord or reddit... tl it yourself or wait for the tl version. They are lying. Or simply wants to ragebait.
Also with the current development with the stepmother we will see some drama. Its more likely that the fatty with the glasses ntrs mc with stepmother than fatty with stepmother... but both are pretty low if we consider it didnt had ntr till now and we have nearly 100 chapters.
Also dont go off on something that was nullified in the last chapter lmao thats clearly ragebait