Holy crap is the 'separated from a loved one' emotion overly powerful.
It's been a year and eight immigrant dwarves are STILL stressed over it despite having bliss and pleasure all over the place since they've arrived.
One went to 'haggard', smashed his workshop and then chased down a dwarf he never met AFAIK and punched her until she puked.
I constructed a good old fashioned happy thought jail with a nice table throne, gold chain and masterwork bed.
Over his 45 day sentence, he 'sank into depression' twice, then when he was released, he immediately went to have a bath and 'started stumbling around, oblivious to reality'.
He was like that for five days, wandering at random and hanging out with my pigs until he had to sleep and snapped out of it.
After that, after ALL that and getting back to the Quaters-level room with a masterwork cabinet in it and smoothed walls, he is STILL STRESSED.
Not only that, but the sad thoughts aren't being driven down the list. He is just infinitely sad forever.
Not sure if this is a bug or not. It seems odd that a year's worth of nothing but joy can't even put a dent in something they got purely as a result of migrating.
Speaking of which, it seems parent can migrate without their children even 'youngest' children, who have to be still 'Child' because they bought a ten-year old with them.