I dreamed that my brother and his wife had had their baby (due soon in real life). They brought her to the family lunch, but it was my father that was the baby. He sucked his thumb and someone had to hold him.
We had to catch an old fashioned steam train for a day trip and I was watching a video of a black cat crawling through tunnels. It had subtitles of what the cat was thinking. The cat knew that my Dad wasn't the baby. It knew something was up.
My brother conceded that they weren't going to show us the baby, because we weren't ready. He warned us that babies do this scent-trapping thing (can't think how to explain further, but sort of to do with cats too), so if the baby snuffles your ear too much you have to pass her on. He showed us other warning signs too.
We caught the train back into town.