I'm gonna be a sister?

Hey It's me Z again! Well My people have been getting ready for something. They turned my hide-away room into something else! They took out my big bed and all the things I used to hide under! Just yesterday my person was in there hanging up clothes that looked like they would fit me, so whatever it is thats coming I will be able to play with and trade clothes with! YAY! They said they had to make space for baby. Whats a baby? They also said to get ready because I am gonna be a big sister.....I don't really know what that means yet. I know my person has been getting fat though. I can barely sit on her lap anymore... It saddens me. They say it won;t be much longer so I guess I will find out what it means soon enough!