As to the less important question .... remember that there was a newly married couple who kept their marriage hidden from NASA so that they could fly together on the Space Shuttle. Space Sex Is Serious Business and there was also a pair of very recently married cosmonauts who flew together. Meet The Only Married Couple To Fly Together In Space I'll let you draw your own conclusions.
But as to the real question, the ethics. Ethics cannot be forced. True ethics is the result of decisions to follow a moral code. --- Can you force behavior which is considered by others to be unethical? Any study of ethics and the history of ethics will tell you that the answer is "Only imperfectly." I believe that the only logical response is to provide the best information that you can, and unless you sterilize or otherwise make pregnancy impossible you better expect that it will happen. --- Even going for the sterilization option my bet would be that sooner or later someone will beat it. Making the question of whether it will happen almost certainly an academic exercise if we have people spend years in space. (As a Parson I have no little experience setting up moral principles that "everyone" agrees with only to find considerable people find agreeing with a principle and living by it are two very different things.)
Any realistic story set in space for anything like a life time would almost have to deal with the question of kids to some degree. (I do like The Expanse's way of dealing with it.)
But as to the real question, the ethics. Ethics cannot be forced. True ethics is the result of decisions to follow a moral code. --- Can you force behavior which is considered by others to be unethical? Any study of ethics and the history of ethics will tell you that the answer is "Only imperfectly." I believe that the only logical response is to provide the best information that you can, and unless you sterilize or otherwise make pregnancy impossible you better expect that it will happen. --- Even going for the sterilization option my bet would be that sooner or later someone will beat it. Making the question of whether it will happen almost certainly an academic exercise if we have people spend years in space. (As a Parson I have no little experience setting up moral principles that "everyone" agrees with only to find considerable people find agreeing with a principle and living by it are two very different things.)
Any realistic story set in space for anything like a life time would almost have to deal with the question of kids to some degree. (I do like The Expanse's way of dealing with it.)