Our cat is still crawling on the window. Do you think he can jump? We will ventilate a lot during the summer. Or that she has enough sense and sees the college (3rd floor) and wouldn't jump?
I bought a mosquito net in each window on 1 wing. It is in a solid frame and securely attached. From the height of the 3rd floor, cats do not usually jump down. Mostly they fall unintentionally from such a height. She could be injured from this height.