Can a man sleep in the same room of her sister or mother in Islam?

Me and my family are shifting to a new place in 2 weeks Inshallah. But unfortunately that apartment has only 2 bedrooms. I only have 1 sister and we have love for each other. I and 15 and she is 17. We used to sleep together in same bed till I was 12 but then our parents transferred me to the 3rd bedroom. We both have our own single bed but my question is that can we sleep in the same room?