@@ScarlettO323 Found the workaround - every relationship is simply added as another "husband/wife" pairing whether married or not. Notes can be added to clarify timeline and relationship conflicts, but this produces the necessary pairing from which to produce a child/children.
Although they have great free research capabilities such as multiple databases of various US censuses I have not completed my family tree there for 2 reasons: 1) Certain data I had kept private about deceased ancestors on another site suddenly became publicly shared without any option to continue to keep it private that I know of; and 2) A transcription error made by Family Search in month of birth of one of my deceased ancestors could not be and was not corrected in the maintained database itself even after supplying a birth certificate showing the correct month of birth. The only option offered was to register in my own tree an exception to the wrong information in the database. The data had simply been copied wrong by Family Search from the correct original & that error could not be changed & is still there. Other companies offer greater privacy options & give you greater control over your own supplied data. At least that's what I found happened in my experience.