I think it could happen, but maybe not exactly like this.
After all, FMC was very well screwed by Walton, so from my point of view it will be a very hard and long process before she is released from prison, so in the meantime someone could easily take advantage of her (as the policeman already did in the final scene) and it is not certain that she will be unhappy about it, given the kind of person she is.
Let's not forget that a husband, by law, even if he is a lawyer, cannot represent his wife (as I already wrote due to conflict of interest)... so I think he'll presumably send Anna to represent her (since she was the cause of everything)... that's why I think his character won't be cut out

Ultimately, the story, up until now, except for the final scene in the closet, has had no NTR content since both of them, when they cheated, always did it behind the other's back.
I just hope that the current paths are not distorted and that I can continue from where I left off.
I wouldn't want to find myself, after having pulled out my balls and left her abruptly, having to go back to groveling for her.