OP here. There have been a few questions, so I will take the time to answer them. First off, my siblings are 9 and 11 (I am a whopping 10 years older than them. Yay me.), so at this age I would like for them to keep being happy and innocent on Christmas and not associate it with the day their family was torn apart. In the case of my mom, she wasn't caught, but the reason I was the one who had to hide everything was because she was being heavily medicated after having a surgery and almost let it slip the night before. My dad has cheated on my mother multiple times and has not treated her very well, so I can understand why she would cheat and I don't pity him. I guess I've dealt with my mom crying over him for so long that I've seen this coming and it is karma. No matter what happens from here, I will not allow my siblings to be sad and have their family torn from them on Christmas because the adults don't know how to adult.