You have an average job and make an average salary (let's say 4.5 or 5 million yen). You've been married 17 years to a wife you love and has been a good wife and mother all this time.
Then, one day, you find out that she cheated on you during that "difficult" time you guys were having about 2 or 3 years in to your marriage, got pregnant by him and that your 14-yr-old daughter is not yours by blood.
Legally, you have the option to divorce your wife and not have to give her anything in the settlement due to her infractions. You are also exempt from the legal obligation of providing for the other man's daughter if you divorce.
Your wife swears up and down that she loves you and that it was a mistake when she was young and dumb.
What do you do?
Do you stay married, keep it a secret between you and your wife and keep raising the girl as your own?
Do you stay married but not keep it a secret?
Do you get a divorce and try to get custody?
Do you boot both of them to the curb?
P.S. The point about the average salary is that continuing to financially support your daughter is not an effortless thing. The money required to care for a child and also send her to university - should you choose to do so - will eat up a very significant portion of your savings, not only leaving less for you in the present, but also in the future and at retirement.
