Your impression is correct. Lina had gone through puberty when she became pregnant. She just went through puberty about seven years before most girls do.

That's why I think she's interesting.

You are saying "she got pregnant", five year olds should not know or understand sex so no she was RAPED and got pregnant because of her unfortunate condition.

I dont have the right name but there is an actual syndrome that occurs in some girls where puberty is reached way too early. Its very sad for this little girl though, it puts real truth to the saying 'a baby having a baby'. Shame on the father.