Either she escaped or she helped someone escape from the WLF.
The point people are talking about in another thread is right here.
Man: 'Word is we're almost wrapped up'
Woman: 'Good, I got my girl waiting for me at the *something*'
man: 'Are you shitting me? They put you with Jordan'
Woman: 'Ah, we get the job done.'
Man: 'tss, I bet you do, ... Oh, this is not fair'
Woman: 'I'm telling you, man, date a soldier, it makes these shifts soooo much easier'
Man: (laughs) 'sure, I'll keep that in mind'.
Later they both talk about Issac and the Scars.
People on the other thread believe this part of the dialog is trying to show us the fact that there's lesbians within the WLF.
I clearly don't see it that way.
1. They mention two people by name and we're either going to encounter them later while playing as Ellie or as Abby.
2. "Dating a solider makes shifts easier" - We know Abby is dating another soldier and Jordan is one of the main characters within the WLF.
3. The soldiers talk about Issac wanting to go after the Scars again. This probably happens again and Abby is captured by the Seraphites as shown in the 2017 PGW trailer.