Does the Bednest attach to the adult bed?

Yes you get a short and a long strap with your purchase. Use the short strap to secure the Bednest if your bed has a frame. If you have an ensemble, connect the long and the short strap to secure your Bednest to your bed. If you have a ensemble bed, make sure the Bednest attaches securely to the main bed and that there is no gap between the two mattresses. If your mattress is set within a frame, then the drop down side panel will act as a bridge up to 20cm between the Bednest and your mattress. The side panel can take the weight of a baby up to 10kg.