i'm with the sss crew, arty. your sister in law is taking advantage of you. it's terribly rude to bring an animal into a host's house in the first place, but what that cat is doing is beyond the call. a good pellet gun will make the situation better. my sister in law had a little poodle. while she was out skiing, her poodle bit my toddler daughter, but only once. it ran off that day..