I'm scared to go to LT

... because I forgot the names of my aunts and uncles. I'm half Lithuanian as my mother is Lithuanian and my father is Greek. I was born in Lithuania but I don't speak the language that much anymore. I'm coming to Lithuania at the end of summer and I'm going straight to my grandparents' place. We haven't met since my mom let them borrow money to buy a house and they just in return insulted my mom by calling her a product... I was in my room and I heard my aunt convinced my grandfather to not give the money back and I started crying because my mom was a great person. I hope they'll forgive me for telling my mom but I got to... I don't know if they forgot about my mom because my grandparents still have a picture with my mom but my uncle and aunt just ignore her and it's hurtful... What should I do when I'll meet them?