sorry if we weren't clear before!
the first couple of nights, you actually would sleep in her room the entire night, right next to her crib/bed (hence the oh-so-cozy air mattress). that way, if she does wake up, you will be right there to reassure her & calm her down.
after a night or 2, you will be able to go one of 2 ways (you will need to feel her out since you know her best)
- stop sleeping there altogether, or
- gradually move your mattress farther & farther from her bed over the course of a couple more nights (again, staying there all night), until you no longer stay in there until she is asleep.
the reason you would stay in there all night the first couple nights is to help rebuild that trust. you are correct in that this can easily become a prop, but i don't think you intended to stay there permanently
hopefully that clears things up a little??