[Gloom] Unwelcome Guests

I bought the Unwelcome Guests Expansion to add to the starter set. I'm having a little trouble with the rules for the expansion. Should I have bought the Unhappy Homes Expansion first? It seems like you need that expansion before using the Unwelcome Guests Expansion.

Hi there. Each Gloom expansion is designed so that it can either be added to the game just by itself, or with other expansions. Sorry for the confusion.