It's not about being a coward, he mother did domething to her, it's comething like "mind controling magic", it makes her not doubt and not want to run away, she can't even kill herself even tho she wanted to. The smoke/insense Ishakan normally has in his palace helps to unleash that but it's very difficult because she's been like that all her life. How do you not know this, did you not read with attention????

Like cmon, you're not gonna be able to say yes later, you want to and yet can't? She's such a coward, but I understand it must be terrifying for her to even have a relationship like this.
Maybe ask questions to feel better and get it over with UGH