Step-Mom is Watching Us...

Story - Step-sis and I have been flirting and messing around recently.. Nothing physical has happened, but there is only so much teasing a man can take!Why don't we take this to the next level?Right now? Mom and dad are downstairs!Then let's be quiet..Do you even have any condoms?No... But I promise I'll pull out, I wouldn't want to get my step-sister pregnant.That would be awkward.. Ok fine let's do it!We start out slow, neither of us want to get caught by our parents! I pull up step-sis's shirt and play with her perky nipples...Can I suck it?Sis is so eager to finally have me, I know she's just as horny as I am!After weeks of flirting around the house, I finally get to feel her tight 18 year old pussy lips wrap around my meat!! Me and step-sis have our fun but right before I cum, step-mom walked right into the room!!I didn't want step-sis to stop grinding my cock, and step-mom was totally shocked when she first walked in! But then the unexpected happened.. Step-mom seemed to enjoy watching them having sex. She started touching her big natural step-mom breasts and I think I even saw step-mom's hand wonder down her skirt! I was so distracted by step-mom, I lost all control and came deep in my step-sister's fertile cunt!Omg you said you would pull out!!Sorry step-sis, get dressed and we'll go to the store and pick up the pill for you...Step-mom rushes out of the room before step-sis notices she was watching us!!'