The best person to tell him would be Jennifer. Let's ask Jennifer what has happened between them and what she thinks about DID. Does she deny you exist?
Jennifer knows I exist. She talks down to me all the time. She thinks I'm a coward because I suffer from anxiety and depression, so she puts me down all the time and thinks all I want is to steal her happiness because I'm jealous since my life is so miserable.
I honestly don't trust her, I wish she'd come here and post, but when she takes over me she doesn't care about this matter. For her, he isn't her nephew either, and she even tries to convince me that I'm not his aunt either because none of us knew about his existence. And when I try to explain her that he has our blood, she says she doesn't care, that my brother was not her brother, and as result, this guy isn't her nephew.
Like I said before I don't want to ask them some questions because I'm afraid of the answers, but I do think they have had a real romantic relation.
A year ago, Jennifer took over my body for like 3 weeks and I don't have any recollection of what happened during that time. All I know is that I got kicked out of college when I was a good student for missing 2 exams, I got fired for missing work and not calling, and even my family who was counting on me for some important things was very hurt and angry because no-one knew where I was.
Sometimes Jennifer has tried to convince me to let her take the direction of my life... I'm just lost... so weak... yet I'm fighting as much as I can to not let her get away with things this way. I mean, she is only 16, but I'm 24.... and on top of everything I'm his aunt, so there is no way i can even consider a romantic relation with my nephew.