Yes, in the wild, when oscars pair off they dig a small divot in the substrate and corral the babies in the divot to keep them safe. They also like to lay their eggs on flat stones such as a piece of slate (or the bottom glass of the aquarium). They aren't immediately going to lay eggs (I think your oscars are close but not quite mature, I believe maturity is reached at about 6" or about a year) and even if they do they have a tendency to eat them if they are spooked or if they aren't fertilized. Keep an eye on the scarred one, probably just a result of pairing displays, mine get in each others faces all the time and with "nip" at each others body's, sometimes resulting in the white scarring you're seeing (it's actually raw flesh from under the scales that were pulled off). I have had mine make it as far as laying eggs but as I am not trying to breed and take care of 250-500 baby oscars so I don't remove the eggs and they are eaten by parents and some other fish in the tank. Enjoy your oscars, they're relationship becomes very interesting to watch, and start looking for a larger tank because you will eventually need it.