I am wondering if my addiction has a name.?

My wife's parents hate me and they don't even try to hide the way they feel about me. They put me down constantly telling me that she could have done "so much better", and no matter what I do, in their eyes it's wrong. At our wedding her father made a toast which included "We respect our daughters choice and even though Mike is not a handsome guy and has a terrible job, we will accept him into our family as if he is our own."....What makes my situation frustrating is that my wife becomes absolutely enraged if I try to defend myself. I am not allowed to talk back to her parents no matter what they say. I get them back in other ways. A couple of months ago I snuck home from work in the middle of the afternoon when I knew they were over and I poured a bag of sugar in their vehicle's radiator and ruined the engine. I was ecstatic. It was like the biggest high you can imagine- A complete and utter thrill. Ever since that day I have taken to other sneaky ways to get even with them. Every Friday they come over for dinner and I am doing stuff to their food. I know it sounds bad, but I have gone as far as using toilet water to make iced tea. Gone to the bathroom on the food instead of rinsing it. I have wiped my using a spoon and then stirred their hot coffee with the spoon so all the poo dissolves. I always spit in their food too. I have left marinara sauce out all night then made sure I served it to them hoping that they will get sick. I have let lettuce soak in a filthy sink that has food particles floating in it for days and then use it for their salad just making sure there is a lot of dressing on it. I have scooped up cat turds and put them in the same boiling water their pasta cooks in...and the list goes on and on. Whenever I do this stuff it is an extreme thrill for me and I feel it turning into a weird sort of compulsion. I get so excited when they come over and can't even control myself when it comes to tainting their food. I am now doing similar stuff to my wife when she makes me mad. Is this normal? Has anyone ever heard of this addiction before? Does it have a name?