I watched the show and it appears that your daughter is seeking your acceptance more then the one whom she should really be seeking- GODS-I think you are a great example of loving the person but still rejecting the sin-she wants to hear that it is alright to live in sin, or should i say live in iniquity-but you continue to be the voice and exaple of GOD in her life- keep strong! stay in the truth and dont get watered down by others opionion, stay with the word of Jesus- I prayed for your family- and I know concering sin is hard- but we can do it- The bible says walk in the spirit and you wont comminit the lust of the flesh. it seems she was trying to not walk in the flesh so then she could walk in the spirit. I know if she reached for jesus and dicplined her flesh and practiced walking in the spirit she will overcome this spirit. 
Like a cat, desire is, if you feed it it getts bigger, and keeps coming back to get feed, the desire gets stronger and stronger. She must step by step put the word of god in herself, focus on the word speak the word of victory by faith over her life, pray and fast, and repent, and she will be made whole! 
It seems she is believeing a lie, that the desire for this sin is her, but that is not the way God created her-she needs to see herself in jesus away from the sin. god bless