It is also possible that you have 2 females and they have paired up. Wait to see if you have eggs. You will know soon enough. They will turn white and disappear (eaten) if they are unfertilized, which would be another indicator that you have 2 females. I have also heard of rare occations when males have orange on their bellies, in which case you will have about 100 fry about 3 days after eggs are laid.

I definetly see some red/orange on its belly........I say it's definetly a female......