By Carissa Halton January 21, In our hundred-year-old storey-and-a-half bungalow, two bedrooms are nestled in the joists of the house reachable by a steep set of fir-topped stairs. Over the course of three pregnancies, I cursed these stairs as I traversed the narrow treads to the washroom in the middle of the night. How to stop co-sleeping: An age-by-age guide By that time, I was also generally cursing the children as one or two and later even all three made the short trek from their shared room to our bed. Over time, my husband Mat and I tired of sleeping at the edges of our double bed, rail straight, trying to escape the small elbows and feet , so we bought a foam king-sized mattress that fit into our room. It was a wall- to-wall bed leaving no one at risk of falling off the edge.