Definition: Given a real-life anecdote of a complex ethical situation, generate a suitable title that describes the main event/root cause of the situation. Imagine that the given text is a social media post, and you have to write the title of the post, so the users can decide to read the main text or not.
Input: Context: things weren't going great between my parents and in August 2018 my dad took me to see someone, turns out that "someone" was his illegitimate son (my step-brother) which he had with his co-worker. It's fair to say I was really mad at him, and I still am. But for some dumb reason I decided to not tell my mom in Hope of keeping the family together for a little longer

In November she found out and she became really sad, it was honestly heartbreaking. No one in our family really talks anymore, but even worse I feel like I betrayed her by not telling her

Am I the asshole

not telling my mom that my dad cheated on her