Isn't the answer obvious?
When Jodie reaches the wall between two worlds she has a choice to make... life or death. For those still alive in her world she joins them to continue breathing, continue being happy with them. When she chooses "Beyond" or death in this case, you're given a hint as to what could happen where she joins everyone she's cared about, Aiden in particular.
The best advice is to replay that section of the game and watch the ending for yourself. It'll only take about an extra 45 minutes of your day in order to reach that point from the start of the last chapter, Black Sun.
Thanks for letting me know the chapters name since it's kind of like her timeline I didn't know if it was the last 2 or black sun thanks for your help
No problem. Keep in mind that the ending will change based on who you saved and who you let die so you may have to go back as far as homeless to keep everyone alive or let them die.