People of the same sex can live together no problem. I'm sure if the police found out they were living together as partners there would be a problem, but thats pretty hard to prove, so same sexes living together is fine, or else my company would be in a jam too.

Men and Women living together outside of husband, son, father, brother, is not allowed, yet is usually turned a blind eye to. You don't tell, you don't make it obvious, there are no problems.