Ulla says in her dialogue and diary that she is married to Albert the cook. However, the cook is Herbert. Also Herbert's dialogue and diary directly suggest that he is Ulla's husband. Albert's diary mentions him being unmarried. Funnily enough, Albert's diary also says that "the life is good, the cook Albert ist great". :)

So either there's a mistake in the dialogue/diaries or one of the characters has a massive multiple personality disorder going on. :D