Hot but embarrassing experience [MF]

I was at the hotel bar with my girlfriend yesterday evening, and at one point she put her feet in my lap for me to massage. I took off her socks and was rubbing her bare feet, when I noticed that a guy sitting near us, with (I presumed) his wife, kept looking over. There was nothing odd about the fact that we were doing this, btw. It was a pretty casual atmosphere, beside the pool. I am into feet tho, so this was super hot for me.

I nodded in this guy’s direction to my gf, who saw him catching glances as well. She then decided to start subtly rubbing my crotch with her foot, like just digging her heel in a bit and rubbing it. At first I thought the guy probably has a foot fetish, but then i saw that his face was beginning to look angry or disgusted. Maybe me and the gf were taking it too far? But anyway, none of his business, right? He doesn’t have to look.

So, at one point he pointed over at us to his wife, and she started staring too! Now I’m like wtf is going on, are they a swinger couple or something??