So I think you stumbled upon a place that offers extras, but I can't say what those extras are or what it might cost.

I have a similar story and like you I wasn't explicitly looking for extras - I just needed a drop in place that offered massages and all of the ones online required an appointment. TBH looking back I should've just gone to the korean 24/7 spa and asked them to massage me.

Anyway, this was a place across from a McDonald's on a small strip mall. Did not look like a sketch shop (with the flashing neon lights) so I went in. Still didn't look weird. They had me hang out in the basement waiting area where I saw showers. Still not weird. It looked cheap, like they were cost cutting but no alarm bells.

Went into the room and I derobed and kept my underwear on. Woman came in and gave me massages and like you her hand grazed areas and she leaned in. But she was clothed. Eventually she became more brazen with her contact and I was like "oh fuck" (because again, I would have gone elsewhere if I wanted extras; IMO I don't like going to Asian places bc their unlicensed nature means I can't tell if they are there willingly or are sex trafficked)

I think she noticed I was aroused from the touch and she made mention of it, but I wasn't looking for extras and apologized and felt bad. Gave her a decent tip for her trouble.

I will also add that I looked up the place rather extensively in the grey/not quite deep dark web. Like review sites that required user accounts. Took some time before that place showed up so they aren't exactly famous. But once I found mention of it, it all made sense.

OP I would just chalk it up as a nothing burger. However I might not return since it doesn't sound like you are looking for excitement in your massages