That part of their relationship was over; they had moved on to something different.

Economic cooperation and progress will be an important part of our new relationship.

"That part of our relationship could never have been planned."

Violence is not going to be part of our relationship.

Love had never really formed an important part of their relationship.

So what that the physical part of our relationship doesn't quite connect?

Once back in the States, this part of their relationship improved very little.

He asks that she not speak about this part of their relationship with anyone.