He is glad Emet at least knows who she is. What he doesn't know is a gaping hole. One that has to be filled.

"I'll put it simple." Which means it's not, his posture tightening. "You and her were together. Era and I loved each other, too, and you were okay with that."

Ardbert glances at his left hand and at his ring. "She meant to marry you first and foremost, but you disappeared. And it nearly killed her will to live."

It's best Emet-Selch finds this out from him instead of piecemeal as time goes.