Rebel against whom or what? He is not in that position and, as far as
MR Palmer has developed the story and "drawn" the character so far, he never will be.
What should such a rebellion look like? By disowning Anna and getting a divorce?
At the end, when Anna has fucked her way across half the city, she will still be able to claim in family court that she is just as much a victim of the scheme as David. And she's right and every judge will see it that way. This means that Anna not only retains custody but, when David is already the sole owner of his father's company, she also receives a considerable sum from the "joint" family property. And since they have a daughter, David won't fight back. (This is how his character is written.)
Now some will say - then play the faithful route!
I can only reply that the game is an NTR game, this is the main fetish - Why should I play the faithful route?
And even on the faithful route, the player knows that Anna isn't being honest with David. Because as
MR Palmer himself wrote, there is the sexual essence in Anna that is only hidden by the thin layer of propriety.
Rebellion - fucked!