The Stockholm Syndrome comes into play when a captive cannot escape and is isolated and threatened with death, but is shown token acts of kindness by the captor. It typically takes about three or four days for the psychological shift to take hold.
A strategy of trying to keep your captor happy in order to stay alive becomes an obsessive identification with the likes and dislikes of the captor which has the result of warping your own psyche in such a way that you come to sympathize with your tormenter!
The Stockholm Syndrome comes into play when a hostage *cannot escape." It typically takes 3 or 4 days for the *psychological shift* to take place and the strategy is to keep the captor happy by obsessively identifying with *the captor's likes and dislikes* -- not converting the captor to the hostage's likes and dislikes or way of life.
I'm not saying Mrs. Smith did not bond with Nichols, because obviously a bond was forged in a relatively short time. However, the use of the term Stockholm Syndrome is not applicable to whatever did happen between them.
She did NOT have Stockholm Syndrome.
She had something bigger than that: faith.