My 1year old loves sitting and playing at the edge of the bed, is she smart enough not to fall off? Or should I make sure she is not at the edge?

My hubs taught our boy before he turned 1yo to slide down the bed (legs then butt first) as he kept rolling to the edge. Now that he knows how to get down himself, we watch him when he's on the bed and just remind him that he's at the edge..