How did the DW find out?
She took a pregnancy test just to clear suspicion, and said suspicion winded up being confirmed.
Is there a reason why she took the test?
The dreaded morning sickness! Louisa had been feeling sick practically every day for over a week, and since it didn't seem to go away on its own, she decided to see a doctor to find out what was going on, as the sickness kept her from keeping much food down even though she was hungry, as and as result had begun to lose weight. However, before she got a chance to see a doctor, she noticed she hadn't had her period yet. Putting two and two together, Louisa took a pregnancy test just to make sure.
How did she feel when she found out?
After getting past the initial shock, Louisa started squealing and jumping up and down before a wave of nausea washed over her and she had to cut her celebration short. All in all, she was elated.
How did she tell the DH?
How indeed... Any ideas?
Did he suspect anything?
Did he? Maybe Edward has a sharp eye for this sort of thing.
How did the DH feel when he found out?
Happy? Mournful at his last moments of childless freedom?
How did they tell their families?
By gathering them all for a big dinner thing? Sending out emails? Calling them? I don't know.
Were their families happy? sad? angry?
Well, if they all get along, I suppose they'd be happy. If they don't, it'd be different (do they get along?).
Anything else?
I can't think of anything else, can you?