I had a SIDS valentines day, 2000, baby was 5 months old. Im disgusted to say, my mind had gone,and had I been in the position of taking someone else's baby, not sure I would have declined, I am disgusted with myself for even thinking this, let alone typing it. My head was ruined, and I was in such a bad place. I did quite bizarre things after leaving the hospital[after then couldn't revive him].
Went to a pond and fed Ducks
, had never done this before in my life
, smashed babys cot, gorge myself with food, to make myself feel sick[did not make myself sick, I wanted to feel ill]
This storyline, will hurt, but will also be helpful, as to how common this occurs
I always believed,stupidly, that it wouldnt happen to me.That it does not happen to people like me
, not sure what sort of people it did happen to though 
As for not noticing your baby has been swapped, many people don't, leave hospital, feeling blessed with a baby, find out later in life, hospital errors etc, and they have someone else's child.
Please don't avoid this programme for this story, awareness can be a life saver