Umm, are you confused? Because you just contradicted yourself. Loose sexual mores but one person in the relationship is not allowed to be with other people by their own choice? Where in the world is that ever compatible with 'loose sexual mores'? It certainly is compatible with a sexual abuser EACH. AND. EVERY. TIME. Mmkaythxbainow.
"Loose sexual morals" is a very broad term, covering all kinds of sexual relationships that aren't in alignment with anything having to do with "faithfulness to one and only one partner." So, it could be light cheating, serial cheating, sexual abuse, by only one partner, by both partners, by someone other than either partner, you name it.
Hot sex scenes and switching of places. Most comments here are all very positive. For those who don't like cheating or loose sex, this story isn't for you. "Oh you had sex with someone else, I'll punish you" and "you can screw my lover, oh wait, screw me while I screw my lover" types of situations. A very loose attitude toward sexual faithfulness in these stories. But hot sex.