User blog comment:Master Sima Yi/Assassinews 19-03-'14 – Two Assassin's Creeds for 2014?: Unity and Comet/@comment-1379990-20140730183153/@comment-1153722-20140801203721

"Incest is sexual activity between family members or close relatives. This typically includes sexual activity between people in a consanguineous relationship (blood relations), and sometimes those related by affinity, such as members of the same household, step relatives, those related by adoption or marriage, or members of the same clan or lineage."

http://en.wikipedia.org/wiki/Incest

The UK, indeed, does not list people related by marriage or adoption. However, there are other countries where that is counted as incest. The examples you listed for France and Canada do not specify it.

I'm well aware incest laws are different in each country, like every law related to sexuality and any other law. That doesn't make my statement incorrect. It's not correct for all countries, however. Regardless of whether Arno and Elise are related by blood, it still should stir up some controversy if Elise is related to Arno. Which was my point...