I'm new here, and new to raising toads. I have 2 American toads that I recieved as tadpoles with a batch of about 12, all seemingly from the same egg batch. I raised them all to toadlets and released all but the 2 oldest and, at the time, I had no idea of their sex. Now they're a bit over 3 months old and I'm pretty positive from their differing size and the fact that one has a pale throat, the other speckled, that there's 1 male and 1 female (I could be totally off here, as I don't really handle them, nor do I know if they're even old enough for the male to chirp). I bought a 20 gallon reptile tank and plan to keep them together in it once I feel they're big enough to properly find their food in such a large area.

My question is - if I keep these toads together, and they're a brother/sister pair (I'm not even positive they are, as they were rescued from an evaporating puddle), will this cause issues with any offspring they may have?