I get why Abby was hurt but she acting like she didn't know the reason Joel kill her dad. you're telling me that the vaccine wasn't even guaranteed that it will work and if it didn't end well they would've killed an innocent girl for no reason. Abby knew that her dad was about to kill "Ellie" right?. so don't you think that she will understand years later why Joel did what he did. if anything I would've expected her to give Joel a really bad beating or something but not to kill him. I don't know maybe I'm thinking too much into it.
This was a great game but that Abby part was so boring and I didn't care about her. F Abby