The advice on another thread was that my milk supply might be negatively affected by letting DH take the baby out (with expressed milk) for 4hrs on a Sunday evening. So what's the safe maximum gap between feeds? If I express while DH is out will that maintain my supply? And most importantly, if a gap of 4-5 hours between feeds is bad then how can I expect DD to eventually sleep through the night as it will be longer than that between feeds?