Keep doing what you're doing. The risks (minimal if you don't smoke or drink or sleep in a waterbed) are reduced if you follow James McKenna PhD's safe co-sleeping guidelines. Babies have evolved to co-sleep for their safety. Separate sleeping in cots in separate rooms is a new and damaging invention of modernity. They will have much better emotional regulation the more time they spend with loving family. A baby who co-sleeps is touched many 10's of thousands time more than a child who sleeps alone, and every one of those touches helps build their brain for optimal learning and development. www.evolvednest.org for evidence.