Do I tell my adopted daughter about her biological father?

Oh wow. I'm so sorry for you, your daughter, and Jeanie. I'm not really sure what you should say... How old is your daughter now? Maybe just tell her that nobody really knows who her father is (it's true that hardly anyone knows) and that you can't be sure. I'd just be afraid she might ask Jeanie then. Ugh. What a terrible situation. You're probably best to just tell her the truth. As long as she's old enough to handle it. And make sure she continues with her counseling. My heart goes out to you and your family. Good luck.