Alright,Since D.M wants to be ontopic,lets use tag

@Error 404
@Random
Yes,it is immoral on the part of their parents to get married that way.
If I consider a person as my sister,no matter how hot she is,I will not go sexual with her no matter what.Simply because it is the right thing.It holds the same for a step-sister or a step-brother or w.e.A sibling is a sibling,blood related or not,I find it immoral to fuck someone that you call as
sister/brother