I don't know if any in Kellyville. There is a massage shops at Kellyville plaza - but I'd bet a kidney it's massage only. There is also a place at Kellyville North, but by the looks of the curtained off booths, I'd bet that's legit too.
I haven't investigated Rouse Hill so can't comment there.
In Castle Hill, however, you have a few choices. There are (at least) four in quite a small radius:
Ashley's Massage - Suite 7/31 Terminus St, Castle Hill - Southern end upstairs
Ding - Thai Massage Castle Hill - 259B Old Northern Road, Castle Hill NSW 2154 Upstairs, Front Entrance Green next to Dominos
Golden Hills - 267 Old Northern Road Castle Hill - Rear entrance near butcher shop - Front next to Edge Pizza
Hills Family Massage - Shop 20/3-9 Terminus St - North end of terminus upstairs
You should be able to find reviews for all of them here. Also a bunch in Norwest / Bella Vista if that's close enough for you.