Why should a parent be grateful to you that you had to clean up a mess because you were doing something else than watching her child. Yes he was supposed to be asleep but obviously wasn't. Do you not check on kids frequently if you are not using a monitor to hear motion? But yes even with checking every 10-15 mintues this can happen and no it is not fun. Might also be time for child to be moved out with others so that he isn't alone at naptime as in easier to peek in on. Never really understood those sleep sacs - thought they were just until a child was able to stand. How aboaut a pair of fleece overalls instead of a sleep sac.