Is it normal to be angered by a human leech?

We employ my Husbands uncle as a salesman in our busy carsales yard. He is paid a salary, so is responsible for paying his own taxes, which he doesnt do. He lives in a state house, which is in his partners name, who is on the DPB (Social security for single parents). She works as a prostitute, who again doesnt pay taxes. My husband and I run a legitimate business, and do everything the hard but honest way. It is a struggle in these hard economic times, but we get through. The uncle will not put any fuel in a vehicle; he just uses it until its empty, dumps it back in the yard, and starts driving something else. My husband and I decided to have one of our fishtanks set up at work with a few goldfish, yet the uncle took control (once again) and put 2 axolotls in it - wont buy the tank, mind you!!! Admittedly, he does pay for their food. We decided to go halves in a boat for the summer. We have come up with our half,once again no money from uncle.Although he has already told us where he plans on taking it. We have a motorbike that is supposed to be shared by all of us, and yet uncle grabbed it at the first opportunity, and we havent ridden it since.No doubt, when it needs fuel, it will magically re-appear! Things finally came to a head as far as I am concerned this saturday, when I grabbed my helmet to bring it home as I am getting another bike, and uncle informed me I wasnt allowed to take it, as he needed to take the groomer home on the back of the bike. He also tried my bike jacket on, but fortunately it was too small. He has already spent his whole inheritance,most of which he spent before his mother died and has nothing to show for it. It just seems he wants all lifes luxuries, at everyone elses expense. Even if he reciprocated in some way, it wouldnt be so bad, but he doesnt. He even scores free chinese meals from down the road as he "lets" the guy park his car in OUR yard. The only reason we put up with it is that hes a good salesman and makes us money - which is what we pay him to do, afterall! I would so love to pull the rug out from under him. I HAVE HAD ENOUGH!!! Any advice would be appreciated