Step-Mommy Cucks step-Son with BBC Friend

You play a very conservative step-mother. Your step-son has invited his black friend over for a sleepover and you're consoling him in your bedroom because this friend has upset him. Apparently he's been making fun of your step-son's penis. You decide to help your step-son out by taking a look at his penis to see that there's nothing wrong with it to reassure him he's got nothing to worry about. The only penis you've ever seen before is your husband's 2 inch dick and so when your step-son shows you his 5 inch penis, you're gobsmacked. More than twice his step-father's size! You never knew penises could be so big! You tell your step-son how big his dick is, and he's really excited, but suddenly your step-son's friend bursts in. You try and protest and talk about how your step-son absolutely has a big penis, but your step-son's friend laughs and instead pulls out his penis. And it's ENORMOUS! A huge BBC 10" Immediately you're mesmorised. Your hands move to start stroking it instinctually, and eventually you start sucking it. You practically forget your step-son is there, except to tell him to stop crying. Eventually this big black stud starts fucking you doggy-style while you look your wimpy step-son in the face while he wanks watching you get fucked by this BBC and you make fun of how small he is and how you wish you'd known how big black guys were and how from now on you're going to be a black only slut. You cum hard on the big black dick, and then your step-son can't help but cum on your beautiful face. You make fun of how quickly he came, then shoo him out of your room while you continue to spend the night with his big black friend.