Massage therapy and Mother in law...?
I am a massage therapist and a physical therapist. I do massage therapy on the side or complimentary for my clients depending on their insurance. Sometimes I work from home but its rare. However my Mother in law (MIL) is a chubby polish woman with long blonde hair. She's been massaged by me before for sciatica pain and because its also relaxing. However the last time I massaged her she got completely naked (which isn't the unusual part) when i walked in the room she left the thin blanket sheet folded up on the floor. I didn't know how to react so I massaged her naked. Nothing happened but I was extremely turned on. Next time I massage her and she's naked do you think I should make a move? Is she hinting at more?
Make incidental contact with her with your semi hard dick. If she pushes back against it, she wants it inside her wet, slippery vagina.
I always let them make the first move, some will reach out and touch your dick, some will spread their legs all by themselves, so will moan and act horny, and some will pretend to be asleep. A very FEW will blatantly ask.
Easiest way I have found is if they are wearing undies underneath the towels, then they ask if they can take those off, always with "oil on them" excuse. What they mean is, "Please rub my pussy!"
No, don't breach professional etiquette, do it another way.