This could be an interesting case if the teachers lawyer asks the diocese to prove ongoing homosexual activity. As I understand it, the church opposes homosexual acts, not homosexuality per se. Sadly many fifty-seven year old heterosexual couples exist in marriages without sex. It’s possible this couple does too.
I think self-identified homosexual partnership suffices to violate the morality clause.
Nice try but no cigar. (The lesbos can probably put it to good use.)