My girlfriend and I went camping with a straight couple that we don't know too well but like so far. We are in the desert and for some reason we decide no one needs a tent that first night. So after we arrange our stuff, the other couple says they are going for a walk, it will take them about an hour. My girlfriend and I are super horny and we decide to have sex while they are gone. For some reason we have brought a HUGE dildo (it is the size of someone's arm) along and we are using it in our sex play. From behind a rock we hear someone giggling and giggling. It is our alleged "friend" the straight man! And the straight woman is there too. They are watching us! The straight man says, "Holy Shit, It's lesbian Wild Kingdom!" The woman says, "I had no idea they'd be doing that…" Then I woke up.