Is the child in her womb her husband's or her father-in-law's? (The following is unrelated and appears to be a separate story: Father-in-law continuously assaulting daughter-in-law - Endo Saya ADN-522)

Five years ago, my wife tragically died in a car accident. Since then, I've lived like a broken corpse. The only comfort I have is my son. He introduced me to his girlfriend, saying he was getting married. That girlfriend—that's my wife. My wife was there. The moment I saw Saya, the sexual desire I had been suppressing for five years surged forth.