"Audience participation was in such poor taste as to be offensive: a male clown repeatedly simulated sex with a young woman "volunteer" after she'd fallen on the stage, and cajoled another "volunteer" to do the same," she wrote.
Ms Tuala confirmed she was one of the women brought on stage that night, which she said was fine at first but quickly became "weird".
Cirque du Soleil declined to comment on the situation but confirmed they are in contact with Ms Tuala.
The show, which was created 20 years ago, features a variety of circus acts, including aerial silks, the human hamster wheel, contortion balancing and acrobatics.
Ms Tuala said despite the awkward experience the first half of the show was amazing.