It was Christmas. You and Portal were good friends. He..didn't really have someone to go to for Christmas, so you invited him to celebrate with your family! He accepted. You brought him to your mom's house. Most of your family, on your mom's side, was there too. He did feel a little awkward there, but whatever. You led him to the couch, sitting down, gesturing for him to do the same. He sat down next to you.