a problem?

consider this: you're sitting on your terrace and studying and then comes neighbor's daughter, child of some 10-11 years, sits there and plays with a cat. however, cat isn't very friendly - he's kinda horrified by the combination of open spaces and strangers. so, he's not into it, and i'm definitely not into it because when she plays around she's distracting me from studying.

however, i find it bad to say to her 'go away'. i did that in a way, a bit subtle way, but she's not getting it. ... so, what's there to do?
i think i'm gonna nicely ask her to piss off, but i know i'm gonna feel bad about it. good start of the day, isn't it?

any suggestions for future situations (similar to this one)?

*update: problem solved by itself. she probably got bored waiting, and asked me to give her some comp. game to play. gave 'pro pinball' away :). the question remains.
[studying,disturbance,child,cat,neighbor]