If she is prepared to sleep in the same hotel room with you, it means she is prepared to let fuck you regardless of double bed or twin beds.
It's what you think that matters. If you agree to staying in the same room, you send a clear signal that you are more than willing to let her fuck you. If you are really concerned about no contact, you should not only stay in different rooms. You should not even go travelling with her as a couple.
It's the same analogy. If you want to be a virgin, don't get married, don't hold a wedding banquet, don't go honeymoon together. You can't have your cake and eat it, you cannot 又要做老舉,又要攞貞節牌坊.