You walk in on your sexy/geeky babysitter just as she's sucking up the last of your little sister into her pussy. Noticing you, your babysitter asks if you like what you see, then demands that you undress so she can help herself to your hard cock. Your babysitter rides your young dick while your sister struggles and screams futilely in her belly. She teases and mocks your sister, describing how she's going to be dissolved by your cum and turned into tit and ass fat, making your babysitter grow bigger and sexier. After you cum, she pulls your sister's cum-soaked bra and panties out of her pussy - all that remains of your bratty sister! Your babysitter gives you a big kiss as she tells you that now the two of you can play in peace! (Custom request using the name "Steven".)