I have to learn to live with this. Last night, I kept my remaining cat in all night. I thought she would go berserk trying to get out, the way she used to before the advent of the cat flap, but she didn’t. I woke up before 5:00 and couldn’t find her. I was immediately convinced that she’d found some secret way out of the house. I finally found her sitting still, waiting for a mouse or bug she was tracking. Relief flooded me, and I felt sorry for my cat, having such an overprotective mother.