The only cheat I use is to fast-forward time to see if Kate runs out of money, but it doesn't happen.
I've tried many saves, and the problem occurs if I don't intervene the first time when Thomas scolds her.
After that, the MC simply says that he allowed it, and after Thomas achieves his goal, Kate becomes a millionaire and never tells her mother about the relationship.
And Kate's uncles never show up, no matter how much I stimulate her anus.
I'm leaving my save in case anyone wants to see what's going on, maybe I'm missing something.
It has nothing to do with anal stimulation. Kate's uncle will appear as soon as you've put Thomas in his place or allowed him to make advances on Kate. Then you have to play the waitress minigame and move around near the stage with Kate.
You're expressing yourself very strangely. Please be specific:
You said,
"after Thomas achieves his goal". What does that mean specifically? Have they had sex yet? And are they still having sex?
You said,
"Kate becomes a millionaire". What does this mean? Does she really have a ton of silver with you? Or does she just earn too much to fail the waitress mini-game? Have you ever tried not to serve any customer, but say to Thomas, "I'm not in the mood to work"?
Then you said,
"after that, the MC simply says that he allowed it". When and how did this happen?
Actually, Kate's storyline works like this:
1. First, you must develop your relationship with Kate and hug her in the tavern when she sat down next to you. Then you must visit her on her bench and ask her if the hug means something. You must choose "Yes, I want more."
2. If Thomas harasses Kate, whether you allow it at first or not, you'll have to catch him again doing this.
2. Then you have to help her, then choose "Put an end to this." And you have to do this on every route, regardless of whether you want to see NTR or not. This leads to Thomas knowing about your relationship with Kate and her making it official to her mother.
3. The next step is to approach Thomas next evening in the tavern. He now offers you the dirty deal to reprimand Kate again, in return, you can sleep in his guest room for free. Your choice determines your route with Kate.
3. Once you've choosen, play the waitress minigame as Kate, move her the stage and Toren will show up.
So if that doesn't work, you've messed something up.