In my last break up, (MFF), it was tension between me and the boy, and in the break up, our lady sort of got lost in the sauce. I lost both of them, and it was incredibly painful. Especially for her- watching your family fall apart and leave you alone is never easy.
What was difficult as well, for all of us, was moving on to new poly relationships. It's difficult to find poly folks, (it was for me anyway), and I felt like at first, I was seeking more sisters just to fill the void I felt from my last relationship, having lost everyone all at once.