During college days I and my chick used to makeout a lot in our car. Since we were pretty open with our friends we used to makeout on the back seat of my car and they used to keep a watch outside.
After a while we thought of spicing up the game and I invited my friends to suck her titties together. She was shocked but excited as well.
We used to undress her and lick her. Sucking her titties and biting them till she used to moan and get wet. Often we ended up cumming in her hands while she stroked our cocks, which she used to lick and clean after we were done.