in a federal court filing she alleged that nxivm was a cult presided over by keith raniere and that heh's need to share what he calls his energy, became pretty aggressive. >> reporter: his energy? with keith, sex and him having a relationship with you is how he shares his energy. so, when i no longer wanted to have relationships with him any longer, he would force, he would rape me. >> reporter: in their filings, nxivm lawyers say her allegations are false. they call them "scurrilous," "scandalous," and "slanderous." but the philosopher, some former followers say, was also a philanderer with what amounts to a harem of women around him. >> i have spoken to five different women who were in the harem, and they have all said, he was kind, and gentle. and it was like having a normal boyfriend except you didn't know when you were gonna see him next. and then he'd go off with another woman the next day. and that was incredibly painful, and very hard. >> there's all these adoring women. and they're all skinny beyond belief. they don't seem to do anything without his permission. >> reporter: ho

symbol but says she realized that it really included the letters "k" and "r," the initials of keith ranierethat out. >> you're stamped as property of somebody. >> i'm not owned by keith. >> in a letter posted on the group's website raniere says there is no merit to the allegations that we are abusing, coercing or harming individuals. raniere says that that secret sorority is not part of nxivm and i am not associated with that group. an attorney for dr. danielle roberts, the alleged brander tells abc news the allegations are unfounded. we'll have a full investigation obviously tonight. >> what more can you tell us about this group, nxivm? >> it's been around for more than a decade. the members get very deeply involved. many have given up career, moved to albany, new york, where the group is founded and we'll have a lot more and catherine oxenberg, you may remember her from "dynasty" and talks about her daughter india part of nxivm, according to catherine she told her she too was branded and a lot more on catherine oxenberg's efforts to get her daughter out of the group. >> more tonight on "2