Feeling Frustrated!!

First let’s get this out of the way, I am a mother of two. I have a 2 and a 1/2 month old and an almost 2 year old. Now, here’s why I’m frustrated... My fiancé and I live together since we have two kids, he works a weird schedule so I try to let him sleep most of the time because I don’t want him to be tired and cranky. However, he has started acting like I’m the one responsible for always taking care of the kids. He also wants me to wait up for him to get home from work so we can spend time together. So I’ve been waiting up for him and still getting up early when my oldest does. I’m exhausted and frustrated because I can’t get enough sleep. I want to spend time with him but I also want sleep. Ugh!!!!