I have gotten to the point in "The Elven Maiden" quest of the Thieves Guild story line where i must plant the bust of Llathasa in Myvryna's cupboard. After doing so i go to lex to inform him of its location then proceed to follow him to the home where the mini "cutscene" starts. he finds the bust then starts to walk towards me while talking, then exits the house leaving me stranded there unable to move or interact with anything. i have waited many days for Myvyrna to return to her home assuming thats what is missing, so that lex doesnt try to leave the house. but she never shows up, is there something i can do to fix this, does anyone know where i can find Myvryna?

I've totally forgotten that scene, and posted something else, intended for somewhere else. Erased it. Oops. Sorry. Wish we could delete our own comments.

i believe she may have died, because i am allowed to sleep in her bed. usually it would tell me i am not allowed to sleep in a bed while trespassing.

I had a glitch in a Thieves Guild quest before. Although you could reload an old save (if you don't have a recent one, you know now to make lots of them in future!), another option is to kill an innocent civilian. This will make you fail the quest, and you'll be directed to the quest giver for a punishment (I think you need to pay some gold), and you'll be directed to the next quest as a result.

I don't know if failing this quest is an option (this worked for another TG quest), but I hope it helps!

ill try it out, although unfortunatley the quest giver was christophe and he is in hiding so i dont know if it will work. but thanks for the suggestion.