LogFAQs > #926438065

Yes. As they are brother and sister they would be committing incest even if no genetics were involved at all. Especially since they are both biologically brother and sister and possess a familial relationship between each other (where-as a step-sibling may not have such a bond).

wolfy42 posted...

I would argue that incest in and of itself is not really bad, it's the potential for pregnancy that is bad, and of course the potential for abuse within a family as well.

If both of those factors are removed, which you would imagine would be true of the wonder twins, then there isn't really anything wrong if they get jiggy with each other.

Honestly unless they found some other shapeshifters around, they might not ever have anyone as compatible as each other for that matter.

Even without the genetic aspect incest usually is a sign that something is very wrong in the family dynamic. Typically either an absent parent or one sibling dominating another. While I'm certain 'healthy' relationships can occur that is typically not the case. Especially since most people are repulsed from incest due to a built-in genetic response as opposed to some cultural conditioning or something similar.
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I am the gentle hand who heals, the happy smile who shields, and the foot that will kick your ***! - White Mage