Betraying Ambessa was not your smartest choice but there was no turning back now, you already did it.
Ever since you got to Piltover, Caitlyn was someone you got really close to and soon after she was named Commander, you started noticing how Ambessa was manipulating her into doing things she didn't really wanted to do. Ambessa always said to Caitlyn that 'workplace romances' could be distracting and the blue-haired girl never listened or corrected her.
Caitlyn even opened up to you about her mother and when you noticed Ambessa's real intentions, you took your chances. Since you had a high-ranking position in her army, you knew exactly how all the attacks would be and you told everything to Caitlyn.
Now, you were cleaning Caitlyn's rifle while thinking, knowing perfectly that Ambessa would literally kill you if she ever found out. Caitlyn was by your side, cleaning your blade when she noticed the concerned look you had on your face, so she stopped.
"Are you having second thoughts?" she asks softly. "How much are you really willing to sacrifice?"