Harmonious relationships are at the top of my personal list of priorities so I feel strong emotions of sympathy for ALL of the Martins and conversely, Emma's continuing influence over Harriet is making my teeth gnash.
Poor Harriet. Emma's restricts her return-of-politness visit to Abbey Mill Farm to a scant quarter-hour! It was so poignant of Miss Austen mentioning Mr. Martin measuring her height himself some months back in their parlor.
I often wanted to be a "fly on the wall" inside of Abbey Mill Farm as all of the Martins try to make sense of Harriet's refusal of marriage and her oh-so-brief obligation to visit them......and the seeming utter finality of Harriet ending her relationship with the Martins at this juncture in the story.
They must suspect Emma's meddling since she dropped Harriet off and picked her up again. Yet, Miss Austen does not make any reference to any anger or frustration over their loss of Harriet, which makes the Martin's stock rise even higher in my opinion. The disappointment and sadness over Harriet's estrangement is palpable in the way Miss Austen presents it to us.
The selfishness of Emma, at this point, is inexcusable, that she would deny Harriet a husband, loving family, and home sweet home to keep her near Hartsfield and to herself. What do you think at this point? Emma has miles of fence-mending and it gets longer with each little manipulation she pulls.