Every week to a parlor comes husband of a wife that is working here and gets massaged by her but he doesnt know that at the same time his wife is being used by someone ( boss maybe ? maybe another worker ? ) and gets humiliated like sperm used as a cream, squirt and/or piss as something else etc.
Each time gets harder for wife to not make a sound because whoever is using her is getting more bold and everytime do more hardcore things to her ( doesnt mind if gets caught - last episode this person could just take the blindfold off from husband while doin wife )
also same idea but swapped
Wife comes every week to parlor gets a massage from husband that is working there but husband is blackmailed bcs he did something wrong and needs to pay to certain people. So to pay off when wife gets blindfolded people will use her while husband will watch it and trying to convince her that its him all the time. Last episode someone will take off the blindfold from a wife and speed up the pace so she cant say a world - maybe even impregnate her or something.