Relationship advice

So me n my SO don’t really have sex. It’s kind of hard to with a soon to be 2 year old and a 2 month old. My SO says I always have an excuse to not have sex but I mean our daughter goes to sleep around 11:00pm-12 by that time my SO is already asleep since he works early mornings. Obviously we can’t do it on our daughters nap time because he’s at work. I know it bugs him that we barely even have sex so any advice ladies?