不純ふじゅん異性いせい交遊こうゆうでしょう
fujun'iseikōyūdeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 不純異性交遊

1. Probably having an affair.; Probably unfaithful.

Polite
Presumptive
Conjecture