IIRC SB said she looked in on BL and BL was "apparantly" (SB's words) fine. By using the word "apparantly", SB has left herself some wiggle room so to speak. In Hailey Dunn's case, the mother checked on her and apparantly she was fine. CA listened through a closed door and Caylee was apprantly fine, she could hear them breathing. Some folks think this case is so different and confusing, it is not.
Those cases are exceptions. Also, in this case, it wouldn't just be one person that has to think she was fine, it has to be SB/PN/boys/SB's daughter.