Generally speaking she'll only do massage when a) the "girl" has another customer already or b) 4 hand massage is requested.
She has worked in the industry for a number of years, so of course she knows what the girls do, and she'll provide the same services. Do bear in mind she is a) older than the girls she employs, but b) she is experienced
Of course tricky to tell age accurately, but over 50 I would say
Regarding a "walk in" the boss (Amy) isn't always in the shop, though it is mostly her answering on the phone.