Taboo Threesome with Step-Sis, Kelly Aleman & BFF

While your parents are away, your sweet little step-sister, Kelly shows up with her best friend, asking you to let her stay. And though at first you are against the idea, they have all the right arguments to convince you. Eventually you get used to their company, what more, things get flirty, true, you try to keep things separate to avoid any issues. But what happens if they find out about each other? Will they argue and both leave or can you convince them for a threesome? It is up to you to handle the situation the sexiest way possible. Are you up to the task?