Rean and Roan pretended to be surprised to hear that voice as well. However, the fact was that they noticed someone hiding not far away ever since they arrived on the mountain. After all, that person was using Divine Sense as well, thinking that her cultivation was too high for the twins or Maeralya to feel.
Space moved apart as an old woman came out, just like Trika did last time. Trika found it strange, though. How come the twins found her location but didn't find Maeralya's mother? Did she fuck up on her spatial concealing ability somehow? Even if she did, someone at the twins' level shouldn't have noticed her.
Trika then put those thoughts behind and looked at the couple who had just appeared. "Sister Filauria, you took quite some time to make your appearance, eh?" Obviously, Trika lied about keeping Maeralya's relationship with the twins hidden. Also, Filauria was obviously Maeralya's mother.