Alternative Flat Sharing

My girlfriend and I are drifters, and in order to save money we chose to share a house with a couple. There was only a curtain between the two beds. That couple was very open-minded and would go on living their own life as a couple regardless of whether there was anyone around them at night, which made my wife and I miserable. Until one day, the woman who shared the flat secretly reached out her hand through the curtain...