First off, are you 100% sure they're correctly sexed? Short-tails are notoriously tricky to sex - females have big scent glands that are easily mistaken for hemipenes...if you're not familiar with sexing bloods you could have 2 females or 2 males...how deep does each one probe?
Secondly, how big are these snakes & what do they weigh?
Thirdly, how are they set up & what are you doing to induce breeding? Male short-tails are usually studs...champion breeders that will typically screw anything without legs in possession of a cloaca. Sure, there are shy breeders out there, but most of the time they don't need tons of prompting...
Perhaps some additional details are in order instead of snarky repartee.
But hey, what do I know...