The 38-year-old star asked her friend and 'very witty expert' Derek Blasberg for some tips for her fans.
She said in the newsletter: 'Summer is officially here, and for us that means travelling to see loved ones and having loved ones travel to see us.
'I had some questions about the etiquette of being a proper houseguest (and some queries about what is polite in this modern era), so I asked the very witty expert on the subject, Derek Blasberg, to guide me in the right direction.'
Blasberg then gave some tips on whether or not to drink the bottle of wine that is brought to your dinner party by a guest or keep it.