If you talked to the snowman, went to sleep, woke up, and Eli arrived in the village, you need to talk to her after you finish greeting each other. etc., ask her about her book, she will ask for help in deciphering the symbols in the book, so then the dialogues should continue. If there was a problem with the quest log, everything should work as it should in this next step, but the dialogues in the game will also guide you very precisely on what to do.
So the situation is that Eli asks for help with the book, we go to Vanya for the symbols, then we go back to Eli, talk to Saya, who suggests building a grave, and we build it at Vanya's, then there are a few dialogues at the grave, go to sleep, come back there, and Eli will be at the lake, where you can immediately take part in her erotic scene. If you have any questions, I'm at your disposal