Then, Christmas Eve night my siblings, dad and step-mom will go together to my dad's parent's house for dinner. We all go together because my dad doesn't want his parents to find out that my brother doesn't get along with our step-mom.

Also at my grandparent's house will be my cousins (but not my cousins from my uncle's first marriage, they come later). That night we'll stay over at my dad's house, but not my brother, he'll stay at my mom's because of the whole step-mom issue.

The next morning, all the siblings will come together at my dad's for the morning. Then, the siblings will have lunch with my mom and my dad's sister-in-law, secretly of course so my dad doesn't know his family is still seeing my mom.