2)Apparently she discovered she's 'born gay' in her late teens.
3)Where did she live b4 becoming homeless ? Who kicked her out?
4)'when he was never in her life' ?Jackie chan has no parental relationship with her.. what does it means? He denied he has such a daughter?
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Chinese fathers wouldn't completely ignored their kids even if they are illegit, especially before the kids found out they were 'born gay'
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A number of possibilities:
--She needs money and found out her mother once had a celeb lover.
--She was kicked out of home by someone because of frequent teen deliquency like having wild sex parties at home. IMO, the most likely reason for her present situation
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How about compare herself to the gay son, Ronan Farrow,of Mia Farrow and Woody Allen. Ronan is a very outstanding young man also with parentage complication. He also estranged from his alleged father Woody Allen because of the latter's incest.
http://books.wwnorton.com/books/War-on-Peace/
https://www.hollywoodreporter.com/news/mia-farrow-says-woody-allens-641534