I work for a science lab and have been working hard on the latest "sex drive" formula, I was doing some work at home in the kitchen but the formula has gone missing. I confront my step-son and his two friends about this and find out they accidentally drank it thinking it was lemonade. I tell my step-son to go lay down and I confess to his two friends what it really is. Judging by the bulges in their pants it seems to be working. It is still in its trial stage but maybe this is the perfect opportunity to test it out, besides they are clearly horny. I tell them to get their dicks out and I strip off and get on my knees. I suck both of their cocks and they fuck me in multiple positions before blowing two big loads all over my face; looks like the formula is a success after all.