Many families are intrigued by oversized mattresses to co-sleep. Co-sleeping, also called bed-sharing, is when parents sleep in bed with their children or infants. In the past, sharing a large bed with your children was common, but nowadays, most families sleep separately. Still, some families have returned to co-sleeping to better bond with their children. However, co-sleeping does raise your child’s risk of sudden infant death syndrome (SIDS) and should be done with caution.