I understand the part about corrupting the wife. It makes sense if the MC wants to "steal" her from her husband. But I have a question...
Will the whole game be based on corrupting the wife? I mean if it will be a corruption where we degrade her, force her to do things that she does not like and that is to be consensual, etc. Where the goal is simply to fuck her and make the husband a cuckold and he actually enjoy it. Not that it bothers me, actually. I'm not that much into netori or cuckold (not even if the MC is the one to do it) but it would be very interesting to see a game well done with this theme.
Or, at some point in the game, we'll have the chance to take a more vanilla/romantic approach. To truly romance her, to "steal" her to have a romantic relationship with her. (Yes, I know that said like that it doesn't sound very nice)