User blog comment:Mr Bio Shock/Attempting to Understand Infinite's Ending... (Spoilers, of course)/@comment-3048593-20130329212731

With the relation between Booker and Elizabeth, it's never really more than being trustworthy of each other. They don't go to having sexual feelings towards each other.

"But wait- this ending also means that because Booker broke the cycle that would lead him to build Columbia- This game could be set in the same universe as Rapture!"

Not really. Remember, this is a multiverse. The world that Rapture is in may be seperate from the one(s) shown in Infinite.