You have your bed and we have our bed. You are too old to sleep with us anymore. Since many normal children sleep with their parents during the early years, the parents must decide if they want to discourage it. If your child crawls into your bed, she should be sternly ordered back to her own bed. If she doesn't move, she can be escorted back immediately without any conversation.
Some parents simply lock their bedroom door.
Another approach is to put a barrier in front of your child's bedroom door. Also, you can't make any noise after the rest of the family has turned in. Discipline technique Natural consequences.