Please forgive me for my ignorance about this family matter! My mother's sister (my aunt) was brought here in the 90s on an I-90 Permanent Resident Card because she is mentally disabled and has no one willing to care for her in her homeland. My mother and father are now dead. As their heir, do I automatically assume I'm her legal guardian? I handle everything for her anyway. If I'm not, how do I find out the criteria to become her guardian? What if I don't want to be or can't? Let me know if you need more info to answer!