Re: Room sharing
A few months after our youngest was born, he moved from our bedroom to his 11 year old sister's. They shared the room until we moved, about a month before his first birthday. It worked out just fine.
At the time, we lived in a cape cod style home: one level home (with basement) with a set of stairs, leading up to a large room. It was my husband and me, a 16 year old boy, an 11 year old girl, and an infant boy. We had the 16 year old upstairs, so that we could be nearer our young daughter. When the youngest was born, we certainly weren't going to put him upstairs and my daughter didn't mind sharing, thankfully.