Despite Barry telling Oliver how him keeping his son a secret from Felicity would cause the couple to break up, we see things play out on this alternative timeline with Oliver again opting to do the exact same thing. Sure, this time around theres no DNA test or paperwork for Felicity to come across, but youd have thought that the usually-smart Oliver would have thought better of keeping this secret from his other half. How this plays out for Olicity remains to be seen, but one would have to imagine that this isnt going to end well for everyones favourite couple (although Barry and Patty are getting close to Olicity levels of awesomeness).