Helping my stepsister give her best friend her first threesome.

Their friendship was based mostly on pleasure, they were four lifelong friends, they had shared all their first times, their first drinks, parties, scoldings, escapes and above all wild pranks, they had seen each other naked countless times, they had told each other everything about their sex life. But they had never done anything like that day. The four of them naked in the living room, they looked at each other without knowing who would start the frenzy.  Two of them kissed, while the other two caressed their naked bodies. The pleasure of each one intensified with the pleasure of knowing that the others were also enjoying their bodies shamelessly.