AITA for executing my cousin?

I (37F) rightfully took the throne I deserved after my brother’s death, even though I should’ve been written into his will to begin with. But, instead, our first cousin—once removed, “Lazy Jane Green”—was given the crown. Why? Just because she’s Protestant and the country was obsessed with it.

I was furious. So, I fled east, gathered an army of righteous Catholics, and took back what was mine, locking Jane up in the Tower.

At first, I really considered sparing her life. I mean, she was just a 16-year-old caught in the middle of this political mess. But then I found out that her father was involved in a rebellion to have her crowned queen, and that was it. She wasn’t the one plotting, but her people were using her as a figurehead, and she was a threat to my rule.

I signed her death warrant, but now I’m torn. I don’t think it was really her fault—she was just a pawn in a game of power. I just didn’t have any other choice if I wanted to secure my reign.

So now I’m left wondering: did I make the right call, AITA?