Not silly at all hun It's true that hormone levels are highest at night, so expressing at night can be a good thing. But in your case your supply seems to be going really well, and your little one is at an age now when some babies are sleeping through. I think that if you are expressing frequently during the day you should be ok with not expressing at night. It's certainly worth giving it a try if it will make things easier for you. I hope it makes life easier for you