I read it a while ago so I may misremembering some things. but what I do recall is a pair of couple is trying some long distance sex while on call with headset vr and some sex toys that somehow link together so when the pussy toy getting some action, the penis toy would move.
but when they’re about to start, the bf mom replace the sex toy with her own pussy. so now the gf is not getting any action from the toy while the bf is unknowingly having fun with his own mom.
some of the line I remember from it is somewhat like:
gf: hey have you start yet? I think this thing is broken.
bf: idk about you but this is crazy good. feels better than the real thing (he still think it’s the toy, clueless about the exchange his mom did)