Its hard to sleep in a bed

Lately we have had a hard time getting maddie to sleep in her bed. She will climb into bed without any problems. However, after a very short time she will climb right back out. Any time she hears or sees us she immediately turns around and runs back to her bed where she lays down like nothing happened. We send her back multiple times until she finally stays. Sometimes we find her taking her naps in the middle of her floor. Tonight Maddie did not want to go to sleep. She knew that she would be in trouble if we saw her, so she did not come all the way into our room. Instead, she layed down on the floor just outside our room and watched us. We just watched her out of the corners of our eyes to see what she would do. Bit by bit her eyes grew heavy until finally they closed. She is now back in her bed slumbering somewhat peacefully.