What follows is a true story involving a family my husband and I know. The names have been changed to shield their identity.
About a dozen years ago, widower John Green and divorcee Mary White married. Both had teenage children from their previous marriages, who moved in with them after the couple married. All the children already knew each other at least somewhat because they had grown up in the same community and attended the same school.
Sometime within a year of the marriage, John's daughter and Mary's son became sexually involved, unknown to anyone else in their family. Their relationship continued after they left high school and through college into first jobs. This was always kept secret from everyone in their family. The two lived near each other as adults but did not share the same residence.
As can happen, the daughter involved in the secret relationship became pregnant a few months ago. Both she and the child's father, who is her step-brother, decided they wanted to keep the child. They also decided now was the time to tell their family of their news and plans to marry.
Needless to say, the family was and remains horrified. John and Mary are in complete agreement the two should not marry and that the child should be put up for adoption. Their adult children all agree, except of course the affected couple. This has caused a huge rift, because the couple in question is continuing with their plans to marry and raise their child.
Technically, this relationship does not violate Australia's incest laws because the couple in question share no common relations. They are step-siblings, not half siblings. So there's no greater genetic danger than an ordinary unrelated couple would face.
The family involved, however, consider this incest, because the male and female in question were raised for several years as siblings.
Neither my husband nor I found this particularly shocking or appalling, but we've kept our opinions to ourselves, because people we know think differently. It's not our business to mind another family's business, but if these were our relations, we'd not try to stop it. If they love each other, then that's what matters, notwithstanding it is a little weird. It's sort of like incest but not actual incest, at least as far as the law is concerned, and their child faces no greater genetic danger.
I'm wondering if, with time, the family will welcome back the couple in question, who are now effectively shunned. They plan to live together openly in the community where the rest of the family lives, so that will surely create some tensions. The soon-to-be-born child also is the first grandchild for Mary and John, which could possibly have some influence on the final outcome.
Only time will tell how this all plays out for the family.