Rowan: If Adam and Eve had three boys, then where were the girls? How could they ever get married and have kids if there weren't any girls?
Lance: Well, maybe Adam and Eve had girls later on and we just don't hear that part of the story.
Rowan: But people can't marry someone in their own family. That is not allowed.
Lance: Well...that's true...
Rowan: Unless that rule started later.
Sooooo....I'm pretty sure we have our work more than cut out for us with this curious child.