Definitely don't tell Your child about the circumstances of her conception. I have a daughter and i'll have to talk to her one day about how she got here - am i going to tell her i was raped - hell NO. I shall just tell her that things didn't work out, i don't particularly care if i'm lying, i firmly believe that no child should ever wonder if they carry tainted blood/genes, its tough enough to be a kid without that coming up
My mother was involved in a heavily abusive relationship and was raped herself by my father. We grew up with her resenting us for being part of him, it took years before any of us could actually see that this was her problem not ours and that we did nothing wrong.