Industrial Building Windows

Hello! I live on the 8th floor of an old industrial building with screenlesss windows that open outward AND inward. Recently one of my little 5 month old kittens has become even more brave and curious and jumped onto the edge of the frame. I’m absolutely terrified she will get up there and fall. If it were up to me I’d just never open the windows again but I do live with a roommate who needs fresh air. Posting here in hopes that someone may have an idea that could help secure these windows. If anything happened to my sweet kitten I’d never forgive myself. I looked into flat cats screens but because the window opens both inward and outward I’m afraid that won’t work. Is there anything I can do to secure them or keep her from getting up there? Any and all suggestions appreciated.

At 6 months old & 8 lbs Thomas looks nearly fully grown to me. Is he just gonna be a big cat? Or did he just grow fast?

soaking up the last of the august sunshine

That Mittens is so hot right now!

Ralph is on the search for the brain cell

They are sharing the brain cell via osmosis

So many comfy beds, yet he chooses this one. Why? 😹

And he chewed up the box too. 😜

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Crookshanks recharging his brain cell in a sunbeam

My sweet old man baby

One brain cell, one eye, but a big personality.

She thinks this is a good chair