Dating your step sibling
So there is no genetic reason not to date/have sex/have children, and even get married, with a stepbrother/stepsister, some parents may even want it (them do date/ect).
There are no laws that say they cannot do so, In The U. Step siblings have no blood relation, it simply means that their parents got married, even if their parents are dating, they will still not be related, in terms of blood, and even if blood there is no laws that prohibit it (But real blood related, is disgusting).
There are no laws that say they cannot do so, In The U. For this reason it would not be considered a legally prohibited incestuous relationship.It isn't genetically/scientifically wrong, and in your case that part is a black and white issue, given the lack of shared DNA.However, had you and your step-sister begun living under the same roof from, say, age 3 and 4 (or thereabouts) and evolved to later have a serious/sexual relationship, that would probably do you both at least a little bit of harm, in terms of blurring the important lines between 'family/siblings' and romance.I thank the people who are beig supportive and are giving encouragement to the subject, not just shooting it down.We're, well, she is afraid of other peoples ideas and what others might think.