Should incest between consenting adults be a crime?

[Amarok]

Though i find it a revolting idea, i too don't feel permitted to tell consenting adults what to do or not do in The privacy of their bedroom or a low-budget porn-set.

However, i would immeadiately worry for any kind of grooming having taken place, be it between parents and children, siblings or whatever else. At that point even consent as a full grown adult would become a debateable subject.

This sounds like a slippery slope fallacy