The first weird dream I had when I was 8

I had a dream when I was eight, (before my sister was born and right after my mom remarried), that we were in a very large room. It was some kind of gathering. I didn't know what for.
This room looked old fashioned. Everything was mostly wood.
I saw my mom come out of a doorway with a baby standing next to her. The baby was in a bright pink jacket. She wasn't a baby though.. She was more like a toddler. She had curly brown hair, and dark eyes.
I could tell it was cold it the room, probably outside.
Across from my mom was Carlos. He was wearing a red Nebraska pullover, talking to someone who he was sitting with.
Keep in mind that all of these people in this room I'd never met before.
I got a flash in this dream of an older woman sitting in the same room, with the same people in it.
Three years later my sister was born.
Five years later, Carlos's uncle passed away, a man I'd never heard of or met. We went to a big family gathering in an old-fashion large room. (His uncle's funeral thingy)
My little sister was two years old and was wearing a bright pink jacket. She had curly brown hair and dark brown eyes. Carlos was wearing his Nebraska pullover.
I was introduced to an older woman. She was a double cousin.
My mom and sister had walked out of a bathroom and that's when I got the memory of the dream. It had been Feburary and blizzardig outside.
When I'd had this dream my sister hadn't been born. She hadn't have even been conceived.
I'd never even been in that city, let alone that building.