Densha no naka de o-keshō o suru no wa, yappari mittomonai wa ne. (As I thought, it's unbecoming to apply your makeup inside the train.)
Situation 1: Mrs. Okubo is riding the train with her mother when they spot a young woman putting on her makeup. Mrs. Okubo's mother leans in and whispers to her about it.
母： 電車の中でお化粧をするのは、やっぱりみっともないわね。