An unexpected threesome

Description: I arrive at your door to be welcomed in the lighting and music, made a very erotic mood i was there to please and serve you took my coat and put my collar on next was fitted the leash i lowered myself down to my knees, looking up at you you walked me slowly, on my hands and knees very little words from you, i was then in front of your cock, about to get hard i then hear someone walking behind me should i look behind or wait to feel them? what happens with that third person now involved?