I'm really excited about the 3 of us staying together. Most hotels give a choice of twin , double or king size beds. I will get us a king size bed. We will have plenty of room. So , your sister said that this is something she want's to do? I really don't think she will want to leave after the first week. No way! But , the two of you can talk it over and you can decide what happens. I will go along with whatever you want. Many hugs and kisses , Terry