When Lyrics

Lyric discussion by In the mist 

Cover art for When lyrics by Opeth

there is only one small part of the story of mayh i don't get, and that part is in this song

this part:

Once inside I heard whispers in the parlour. The gilded faces grin, aware of my final demise. And I cried, I knew she had lied. Her obsession had died, it had died.

I understand the entire story but i just can't fit in these lines, because what does he mean she had lied ?

you almost get the idea that I-person was murdered because of the sentence "The gilded faces grin, aware of my final demise." and that she knew about it. but that doesnt seem to be very likely, and the whole thing about her being with another man is even more unlikely and illogical, and it doesnt even return in the rest of the story, if she was with another man she wouldnt be with him just for the first days. that doesnt make sense at all

so i just dont know what to make of these sentences