I have two children whose biological parents are married to different peope - the bio dad is married to a man, and the bio mom is married to a woman, although I don't think the genders are actually important. I am trying to add the dad's husband and mom's wife as step-parents, but when I add them as secondary parents, it creates a romantic relationship between the step-dad and step-mom as if they were married to each other. How do I fix this?