What can we legally do if my daughter's friend believes she raped her while she was intoxicated?

Side 1: She tells me that she feels as though my daughter took advantage of her and performed oral sex on her while she was "passed out drunk." She has equated this to rape. She acknowledges that both had been drinking. Side 2: My daughter, admits that the both of them had been drinking. She also has admitted the sexual activity. She is aware that she, when sober, is not bisexual. She stated that she was so drunk, she was throwing up etc. My daughter told me she feels awful and wasn't thinking clearly. Additional info: Both girls were 16 at the time. Both admit to drinking. There was a third party, who witnessed it and has told her that she didn't see it as rape. The person is her friend primarily, my daughter’s acquaintance. If it comes to being reported, could my daughter be charged with rape?