It's a terrible thing to know you cant trust family. I am in a similar situation as you. I've been helping my elderly, retired parents both financially and with everything else. I was shocked to have the rug pulled out from underneath me recently. I've come to the conclusion that they are NEVER going to change and I shouldnt try, nor ever expect them to. So I continue to live my life teh way I think is right, and I continue to help them. Even though others have argued taht I let them take advantage of me. I dont care, they are my parents, tehre's no changing that. And I do it because I love them, and it makes me feel good.
here's a link to some great advice I got........