My brother has that and after the first night his wife put the kids both in one cot and took the other for herself. I don't know what they'll do when the kids get older.
Our "50" has a full size bed, or near enough that full size sheets fit. My wife and I have no trouble downsizing from our king at home, and I outweigh my brother by about 115 lbs and my wife has at least a foot on my sister in law.