Sexy couchsurfing Girl invites you to a Party

Usually only weird guys use your offer for Couchsurfing. But this time a sexy young girl answered your ad to sleep on your couch for a few days. She has a busy schedule during her visit to the city. One night she comes into your room to check her party outfit in the mirror. She tells you what she's up to: she's going to a sex party. And since her companion has canceled, she asks you if you want to come along and the preparations start right in your bed.