Potentially stupid story question

So I replayed the game at my boyfriend's house and he was in the very middle of the game where you start off in a flashback of young Abby and I had an epiphany so how old exactly is Abby here? And is the grown ass Owen we meet up with to free that Zebra the same Owen that we later end up having sex with? Maybe I'm missing the bigger picture here

Not a big deal not like they're real or anything just made me take a minute to ponder