Infidelity is presented as a no-no and character flaw. But we all know Anne Heche is faking it. Willis actually prays to God and cries. Strong family relationships are stressed. Saving others through the sacrifice of one's own life is the highest good here.
Marriage is celebrated in the closing credits.
No sex necessary. Godzilla is fully nude, but, thankfully, no genitalia. There is talk about sex, but there isn't any. No nudity, no wife swapping, no adultery. Instead, people get married and family relationships are held up as the highest importance.