Your sister's best friend came over to get your sister's opinion on some dresses she had. However, you are the only one home! She decides to get your opinion instead and starts changing in front of you. You feel weird at first, but she normalizes it and helps relax you. Then she notices that you are getting hard watching her change. Next, she admits that this was her plan the whole time because she wants to fuck you so bad! You both fuck hard till she squirts all over!