@ysmina-- Yes, a swollen liver and an enlarged liver are the same thing. The medical term for it is hepatomegaly.
Did your aunt mention any other issues or symptoms? Does she also have a swollen spleen?
People usually assume the worst about a swollen liver and think of potential causes like cancer or cirrhosis. But that's not always the case. For example, I was also diagnosed with a swollen liver five years ago. After lots of testing, I found out that I have a fructose intolerance and fructose is digested by the liver. This was causing my liver to become enlarged.
I only had to make dietary changes and my liver went back to normal. So the cause of a swollen liver is not always difficult to treat and painful.