How much is too much 🤷🏻‍♀️

For any mommies that have kids that share a room how do you do it space wise ? SO and I currently have a 1 year old together . And soon due with baby #2 . SO has a child of his own from previous marriage . Our daughter and Ss share a room already and soon the 3rd will be in there . There room is not big all . We’re renting as of now but working our way into buying a home . I seriously feel stressed having 3 in a room . SO’s son is only here From Fri-Mon morning . But still seems like a lot of kids to a room