Errol, if I am following you correctly, I don't think you would need to delete anything. The concept here is that there is one single tree, and we all interconnect somewhere if we go back far enough. If James is the son of Sarunporn, you can create a profile for James and show him as her son. The profile can be private, and James does not need an account in order to have a profile. You can also create profiles for Sarunporn's parents, and siblings if there are any, and then expand further on the spouses and siblings of parents, add grandparents, and so on. Eventually you'll get to a connection to the big single worldwide tree. You can mention your partner relationship in the biography of your own profile and that of Sarunporn's if you wish to, showing your connection to that profile or that line of ancestors. That's the way this whole thing is evolving.
If I missed the boat on interpreting your question, please post again.