What's going on?

Today mommy and daddy picked me up from school and took me to a strange place where a lady put things on mommy's belly and they watched tv. The show didn't look interesting to me and I didn't like the tiny room. I cried and cried but daddy and mommy didn't want to leave. They kept saying things like, "See the baby on tv?" and "That's your little brother". But I don't know what they we're talking about. There was no baby I could see and the only brother I've ever heard of is in my "I'm a Big Brother Now" book. Really it was all very strange. I hope we never do that again.