Charlotte Sins has been cheating on her girlfriend, Diana Grace... not only that, but the person she's cheating with is none other than Diana's best friend, Scarlette Moon! One day while Charlotte is strap-on fucking Scarlette, they get a shock when Diana catches them in the act. Diana is furious about the betrayal, but surprisingly she decides to give them both a sexy punishment, which Charlotte and Scarlette eagerly agree to. Diana dons her own strap-on and femdoms both Charlotte and Scarlette in a raunchy threesome, including a strap-on sex train!