In my experience the majority of in room massage girls have been open to extras but the discussion has to take place in your room so you are committed to the massage with no guarantee...and of course I have received hand relief of my cock so don’t know if they would get your wife off
Others might know of other options and maybe you could talk to the massage parlours about sending a girl to your hotel
Alternatively try WeChat and you might find an independent willing to entertain your wife...I had some success with WeChat when in KL upto and including full service with anal...so I guess everything is available for all tastes