Comment on the scene where the main character, Mrs Linton, sees the reflection of her face in the window? (chap.12)

Are you sure this question doesn't pertain to Catherine's reflection in the mirror?

'Among his books!' she cried, confounded. 'And I dying! I on the brink of the grave! My God! does he know how I'm altered?' continued she, staring at her reflection in a mirror hanging against the opposite wall. 'Is that Catherine Linton? He imagines me in a pet - in play, perhaps. Cannot you inform him that it is frightful earnest? Nelly, if it be not too late, as soon as I learn how he feels, I'll choose between these two: either to starve at once - that would be no punishment unless he had a heart - or to recover, and leave the country. Are you speaking the truth about him now? Take care. Is he actually so utterly indifferent for my life?'

The vision she sees in the window is a reminder of Heathcliff and the home of her childhood.

"Look!' she cried eagerly, 'that's my room with the candle in it, and the trees swaying before it; and the other candle is in Joseph's garret. Joseph sits up late, doesn't he? He's waiting till I come home that he may lock the gate. Well, he'll wait a while yet. It's a rough journey, and a sad heart to travel it; and we must pass by Gimmerton Kirk to go that journey! We've braved its ghosts often together, and dared each other to stand among the graves and ask them to come. But, Heathcliff, if I dare you now, will you venture? If you do, I'll keep you. I'll not lie there by myself: they may bury me twelve feet deep, and throw the church down over me, but I won't rest till you are with me. I never will!'