If you're in the US - it depends on the state you're in and the nature of the relationship. If the relationship is sexual, then yes, it would probably be illegal.
illegal! if they are a minor, but still illegal!
no
Why would it be illegal? There is no family relationship.
Illegal? If so, then you need to make it legal and above board for your relationship to last. This is because honesty and integrity win over sneaking around.
It is illegal.
no, its your standards
yes
Dating is not illegal; sex is illegal.
It would be illegal to have a sexual relationship with her.
It is not illegal for them to be in a relationship. But in the opinion of most people it would not be a good idea.
No it is not illegal.
ur dick gets smaller