how are we even related?

my dad comes home from work with the christmas party pictures and asks my mom "do you want to see these before i throw them away?" and she says "no" and he threw them away and took out the trash already. I wanted to see them and keep them. How can we even be related that they would THROW PICTURES AWAY? my dad did ask if she would want to see the other people in the pictures and she said only if he cuts her out of them first.