Kate couldn't help remembering Henry whenever she saw Tom.
After all, they were around the same age, and he had green eyes just like him.
Of course, Henry was a lot more charming and handsome. But seeing Tom was enough to pull Kate into the nostalgia train.
She missed Henry a lot but knew she couldn't return, not when Henry probably hated her for what she had done.
Thus, Tom had become a channel for her to let go of her guilt. Helping this young man will give Kate the illusion that she tried to mend her mistake of leaving Henry.
But it was all just an illusion in the end.
She pulled the trigger by leaving, and there was no turning back.
Henry wouldn't forgive her, and it was probably for the better because she didn't want to be the thorn in Henry's life.
