If you're looking for valifation from strangers on the net to continue your "maybe too close" relationship with your family member, you have a problem. And your statement is extrememly open. You will get a broad spectrum of opinions, which in the end, are just opinions from strangers. If it bothers you so much that you're too close, then fix it. If you want to get more close, fix it. Hopefully all of you are of legal age and are working with consent before engaging in any kind of questionable activities between siblings. And I sure hope you're ready for what comes with it. Other than that, this is a global discussion forum for kink and BDSM. Feel free to discuss kinks that may perhaps interest you.