Wanting and going to be are different things... it felt like this chapter gives evidence to her not willing to just switch sides... though it depends as pageone also says things that make Ulti a fad chaser.
1- get captured by marines.
2- those siblings escape after the fall of the BP.
3- join a crew from our side.
There’s nothing to hint she and her brother are joining any crew, but simply a speculation from my part.