Not only are you mad that your step-father had to come on this trip, but now your step-mom's too busy with her work to even hang out. You miss her so much and you just want to spend some time together... without step-dad! You're step-mother picks up on this and and decides you have time to play while your step-father's in the shower. You're too scared you'll get caught at first, but you quickly give in because you miss her touch! She lets you eat her pussy and then rides you until you cum deep inside of her since there's nowhere else to hide it in such a hurry!