A woman can fake an orgasm vocally, but the anus never lies. There was no fakery here. When her anus involuntarily protruded and began contracting at 1:99 she quietly and lasciviously completed a very intense and gratifying orgasm. Afterwards she likely rolled over and slept like a fucked rabbit. Yes, anal contractions are a positive indicator of orgasm. see my profile and faves for excellent examples.