Upon Ronron's reiteration of what she had done when she had come to the Central Continent, Emily wanted to go visit too.
In a way, she had always regretted leaving the young Lilin without a mother, even though technically she herself was her mother.
Just because she wasn't the one who gave birth to her did not mean that she wasn't allowed to be her mother. After all, Alex hadn't been responsible for conceiving Ronron, and yet he still acted every way her father did.
So, after hearing that Alex was once again returning to the Central Continent, Emily showed great intention in wanting to come here.
The older Alex decided to come too, fully supporting his wife in whatever it was that she wanted to do.
Since both of her parents were going, Ronron wanted to go too. Given that she would most likely be coming back with her sister this time around, she would stay there for as long as she could.