Freel4ncer
Cadet
I don't think the secret is so big of a deal actually, beacause Irina knew about Vaughn's secret and in the end of the episode Irina sad this to Sydney : "Sydney, you may not see me at your wedding. But I will see you."
That means that Irina knew that Sydney would marry him even when she knows the secret. And i don't think Sydney would marry him if he was some kind of a russian spy, that will just break her heart.
One more thing is that Vaughn told her about the secret when he was driving the car. You don't tell something that personal when you driving a car, risk that Sydney gets so angry that she jumps out of the car.
So my conclusion is that Vaughn's secret isn't so big of a deal.
That means that Irina knew that Sydney would marry him even when she knows the secret. And i don't think Sydney would marry him if he was some kind of a russian spy, that will just break her heart.
One more thing is that Vaughn told her about the secret when he was driving the car. You don't tell something that personal when you driving a car, risk that Sydney gets so angry that she jumps out of the car.
So my conclusion is that Vaughn's secret isn't so big of a deal.