Isn't it just a kick in the teeth when you really go out of your way to help someone and they aren't even grateful? Or worse, they totally take advantage of your kindness? That knife in your back feels even worse when it's from your own family. But, family drama is no mystery to the world and happens often. Take this woman, for example, who recently cut her own sister out of her life. Her sister was a struggling mother of three, so she went out of her way to help her as best as she could. She d…