I dated a very open-minded girlfriend in my early twenties. We used to go in same class in high school but fall in love two years after finishing. She was a petit blonde with curvy ass and small tits, very provicative, who loved to make me jaleous, and got lots of attention of men and women too. We used to have sex anywhere we wanted, risky places,public toilets,rooftops,buses... First time a shared her with someone was during the bus drive to another city. Bus was empty,with only 7 or 8 people in it, We sat on the last 5 seats on the bus,and without light we started to touch ourselfs. She stroked my cock while I touched ber clit and inserted 2 fingers in her soaked pussy. We haven't seen a guy that moved near us and she told me that he was watching us and stroked his cock. She looked me with that dirty look and i knew she is up to something. She called him to sit near us and started to stroke him. I couldn't believe what was seeing but was so turned on. She told me that she want to suck him and moved to him. He didn't say a fuckin word,just sat there and enjoyed what was happening to him,she looked me the whole time while was suckin' to him, and she swallowed him all she could than,moved to suck me while he touched her pussy. I dropped my sperm on her lips and head and told him to fuck off of us. That was the beggining of our open relashionsip (specially for her side)that led us to final brake up, but sex was amazing the whole time...