Sis Makes Brother Cum Under the Blanket

Were sitting on the couch together, mom and dad are in the other room. You keep bugging and bugging for me to make you cum. I tell you to stop being a freak... go find a girlfriend... but you dont stop begging for your sister to do it. I give in of course. I really don't want to get caught for you .... in....*you know!* so we do it under the blanket just in case!! Can you imagine getting in trouble for... *you know!!*