Jennifer + Ben
POSSIBLE SPOILER
I remember wondering what type of relationship they would have if Ben had lived. Then I realized Jennifer meant he would be hers in the remainder of this life and (more importantly) also in the lives to come. Ben suddenly dying in this life made sense. Ben had to die to have his soul given by Maggie to Jennifer. He would reincarnate and so would Jennifer, only closer in age the next time around. Of course Meg/Maggie would likely reincarnate, too. When Jennifer said she would know of love that Meg/Maggie had previously denied her, she meant she would know of love with Ben in the life to come and not the life that they were currently living.
The reincarnation theme made a lot of sense in how everything played out. Very well done and brilliantly written.