My cat got soo scared, he peed?

I was in my backyard done from doing my chores and when I walk inside my little sister told me to not get mad. So I said, 'OK.' And then she said, "A few 分钟 ago, I was cleaning my room with the vacuum cleaner and then I scared Tommy (our cat) and he peed! Isn't that funny?' Of course, I got really mad because then I found out he had peed in my closet! And I also didn't find it very funny that she had scared him like that.