Thank you,
@mp5stab and
@Aluafaen et Rimmon Ra . Yes, I'm going to close out the story in style.
Given all that what Leah has endured, the rush of exhilaration at the realization that her plan worked and her sacrifice was not in vain would cause her to smile so broadly, at least briefly. It was a rush of endorphins. We know from anecdotes that other severely injured people have experienced the same. I wanted to depict that.
Also, the Romans losing this battle (but not the war) is a true story. During the siege of Jerusalem, the Jewish rebels did destroy the siege ramps and kill hundreds of legionaries as a result. It was a huge humiliation for General Titus, which caused him to withdraw his army and develop a new plan of attack. There have been questions throughout history on how Titus could let this military disaster happen. I created a fictional reason why: Leah.
And, yes, the Romans do ultimately prevail in real life and destroy the Temple. But that's through no fault of Leah's.