IndianRingNeck.com

I have two IRNs, I have no idea what gender they are but i'm concerned that if i have one of each that they will breed. do siblings breed and is this something that i need to worry about?

They can breed, but it isn't recommended.

other than separating them, how would I stop that?

As far as I have been told, there is no real way to stop them from laying. This thread on a different forum has some useful info: http://www.tailfeathersnetwork.com/comm ... ing-mating

From the link:
"What you could do is buy some fake eggs, and replace the ones she lays with these. That way, she can sit all she wants and nothing will come of it. Some people take the eggs that are laid, and boil them, and give them back."

I have two siblings also, who we believe may be male and female, so I've been looking into it lately, but still haven't found much info. :/

Best thing would be to separate them. Siblings (of any animal, really) breeding is not recommended because genetic flaws will be bred double, because both will carry the same flaws. They'll breed their siblings, mom, dad, it does not matter.