All relationships are always a co-creation. Regardless of the health or longevity of the relationship, both parties, or all parties are involved in one way or another throughout time.
There are always at least two perspectives in a relationship. It will never be one, although certain agreements may exist.
And, in every relationship, we always bring ourselves and all of our accumulated history and knowledge along.
This is why good, effective communication is so important.
There is a lot going on within ourselves, and now in a relationship, there is substantially more that can cause drama and intrigue, as well as love, joy, and freedom.