Some of the Revesby Nice employees are either current or ex Jaitong in Kogarah Bay. Going on that I doubt you'll get anything past legit massage. I'll add, Jaitong has produced/attracted many very skilled masseuse over the years.

Also, My Thai is on a rapid expansion. I think they have 6 shops now. The most I've seen in Sydney under one brand. I've been to Kogarah and Sans Souci shop heaps and they are very legit too.