If someone had managed to open it quietly how could they have pulled themselves up and through the window then into the hall without making a sound?
After that they had to sneak down the hall and into the baby's room, grab the baby without waking it, also find the 3 cellophones and grab them then get back to the window and slither out with the baby in hand.
Possibly they could have exited out the door but that's even more chance of making noise.
You are correct, something smells.
now = no 2x...jeesh!