平日 へいじつ昼顔 ひるがお つまでしょう
heijitsu hirugaotsumadeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 平日昼顔妻

1. Probably a daytime wife.; Probably a housewife with a secret life.

Polite
Presumptive
Conjecture