Step Mom Thinks Husband Is Licking Her but Gets Surprise Facial From Step Son

I was resting in the room while my husband went to the store and suddenly I felt his hands on myself and his tongue slowly penetrated my pussy. He started fucking me, but I didn't make a sound so that my step-son wouldn't hear us. Wait... does he want to cum on my face? Fuck, that's my step-son! What will I tell my husband??? We need to wipe everything and forget.