I am writing a story about two very different women who end up in the same summerhouse. They both expected to rent a house for the summer holiday by themselves, but due to a misunderstanding, they must live together for about a week. The two women are: Sarah, 27, a journalist and former model, blonde, 5'7", 110lbs. Mira, 21, a college student, brunette, 5'5", 250lbs. They are polar opposites and live different lifestyles, and after a while they start to go on each others nerves. I'm fine with my second act, and know how the third will go, but I still have problems with the first act and how these two will act around each other the first few days living together. Should I go with the obvious? Snarky comments on different lifestyles? Or should I just let them keep their thoughts for themselves? What would be the most humiliating for the one to do/say to the other, and vice versa?