chinese girlfriend 1st rave turns into first swing

took her to her first rave after she recently turned 18. she became very happy and extremely horny when we were there. we've been dating since she was in 9th grade, i was her 1st and only. always fantasized seeing her with someone else. this day she said she was in the mood to full fill my fantasy as long as she's blindfolded and hands tied. her next door neighbor is a single latino ****who she babysits for, about 15 years older, but i always see him checking her out since her highschool days, especially in her mini skirt. after i tied her up in her room, i asked him to come over. once he opened her beddroom door he immediately got hard. i left the room and asked him to record. thank god her parents were gone for the weekend.