YOU SAID:

My mother is sitting in my seat. How dare she. I shall... well I can't really do anything but how dare she sit where I sit!

INTO JAPANESE

母は私の席に座っています。彼女はなんてまともになんだ。私は..まあ、私は本当に何もできませんが、彼女は私が座っている場所に座るなんて!

BACK INTO ENGLISH

My mother is sitting in my seat. How decent she is! I.. Well, I can't really do anything, but she's going to sit where I'm sitting!

INTO JAPANESE

母は私の席に座っています。彼女はなんてまともなんだろう。私。。まあ、私は本当に何もできませんが、彼女は私が座っているところに座るつもりです!

BACK INTO ENGLISH

My mother is sitting in my seat. How decent she is! I.. Well, I can't really do anything, but she's going to sit where I'm sitting!