http://www.straightdope.com/classics/a961122b.html
Mr Jenkins, biblical precedents aside and based on the statistically insignificant sample size of three children in four years, I can confidently state that possibility of overlaying is as close to an impossibility as I am aware of.
Mind you, during this period I’ve never gone to bed in a triple bunk pissed, stoned or with malevolence which might make a difference.
However, my firm recommendation to you is get the adorable Binky out of your own bed and into a bassinette or similar personal space asap, for your personal harmony and well being will be outside your control until you do.
You can’t negotiate with terrorists and newborns.