[FFM] My girlfriend [24F] finally got to experiment with her best friend [25F] and then lead to our first threesome [27M][Long][True]

 This is my first time writing one of these but I thought you guys might like to hear my experience this past friday.
    For some background my girlfriend has always been curious and wanted to experiment and go down on another girl.  She has made out with a few before this experience but not much past that.  We have always thought it would be fun to add another woman into the mix as well.
    My girlfriend (lets call her Emma) is full figured, dark haired, sexy ass, DD tits, tattoos and lips to die for.  Her best friend (lets call her Brooke) is similar except smaller ass, bigger tits and more tattoos.  They both have an alternative look about them.  There is also another girl involved (lets call her Sally) at the beginning but from what Emma said she was just kind of there.
 

Now for what happened on friday.  Scroll further if you want to get to the dirty stuff!!