As Xin continued to tell her more about the different timelines her vessel core continued to become stronger and stronger.
Stronger in the sense of profoundness not in the sense of rigidity. Unaware of this Jia was devastated at this point. She couldn't ask the mysterious voice to stop cause god knows what if he gets angry and do something to her!
On the other hand all her ways of escaping were closed. It was more like she didn't know how to escape. She could have escaped that place if her inner dimension had collapsed, but to her dismay something like that didn't happen. And for some reason it got stopped in the middle.
Xin in the real world was smirking to his heart's content and was taking his time to have some fun with Jia and her inner world. He was providing her with every possible help through which she can build a good core and be a good magician in the future.