[Yours_bear_for]

Firstly, I think this is the first story of our writer that's why he is making sure that we readers get the proper update, so it's not an issue that he is taking such time to update next part which is completely fine.
Secondly, I think there are certain points in the story which needs to be addressed
1.) For how long this affair is going on(I think the time her phone started switching off during afternoon, uncle started fucking her)
2.) Will she go to Australia, I personally think no because she will depart her son with her brother and spend good time here with uncle
3.) Is this story going towards cuckson mindset, if not the writer needs to address this issue at the earliest
4.) If the son is so smart than either he should have installed cameras in home or some other surveillance method.

Now I have one suggestion, and I want my fellow readers to think about it:-
There is no story in this forum where the son conforts his mother with photos and videos of her adultery and than go out of the way to bring his gf home and started spending time with her more in his room. This should create such a tension in home that mother started sensing the distance between them and starts neglecting uncle.
In real life scenario a women who cheats will start giving more time to family by fear of discovery and to keep a watch on their moves.

The second suggestion is son comforts mother with photos and videos, than give her choices that she should divorce father without taking a single penny from him and then starts living with uncle wheras she saw her son completely changed behavior against her where he saw her but ignore her if she tries to talk to him, he will go without responding. He saw her situation with uncle where he treats her like a body nothing else, and in over time she will regret her decision in leaving her family

I think the writer needs to add these points in the story or mix them and then add them