New Zealand woman Warriena "Rrie" Wright was allegedly taunted and gasped for air in the seconds before she plunged 14 storeys to her death on the Gold Coast last month.
Australian media have reported court documents filed ahead of a bail application on Monday for Gable Tostee, the man charged with her murder.
Police claim Tostee's phone recorded three hours and 19 minutes of audio, which they will allege demonstrates a man and a woman arguing and struggling.
According to reports on the Australian, not long after the pair met using dating app Tinder, Tostee allegedly told Ms Wright, "I will do what you want, I will be your sex slave."
But soon after, he is allegedly heard saying, "That's enough, you have worn out your welcome, you have to leave," just after 2am.