I met this amazing girl a while back who would be described as "bisexual but heteroromantic". She's what the Redpill people would consider, a "unicorn".

She is

  1. from a stable, rich family
  2. religiously monogamous
  3. has low body count. She's 24 and only been with 2 guys before me
  4. honest, transparent and doesn't play games.
  5. submissive and trad.
  6. very supportive and understanding
  7. sexually conservative. No she's not going to do a fucking threesome and neither will I.

Yet, when they hear the word, "bi" all of a sudden she's a nasty whore with promiscuous tendencies and it's 100% guaranteed she will cheat on me. So I would like to see a discussion on this. Is her sexuality considered an actual red flag, and if so, how? Or am I being lectured by some butthurt neckbeards?