my family was a lively one and both my 36 year old mom and my 18 year old little sister were very hot. we had a big dog called Giant and he was always following my sister around. i once saw Giant licking my sister's pussy in the garden and it turned me on a great deal. i did not report this to mom and dad because i thought it was nothing.
my dad works on weekends and i always go out with my friends so i really didn't know what went on in the house untill one day. i went out but returned home early. as i opened the door and entered the house, i saw my little sister licking my mom's pussy while Giant rammed his 12" cock in her tight pussy. i was very turned on by the scene and i wanted some pussy real bad. i cleared my throat and my mom, sister, and Giant all looked up at me with surprise. i told them not to stop and continued to sit down and watch. after some time, my cock was so hard i thought it was going to burst. my mom asked me to join the party and i wasted no time joining. i quickly stripped and put my 11" cock in mom's mouth and started fucking her mouth real hard. my mom was an expect at blow job as i came quickly and she swallowed all my cum.