then I'd suggest you consider:
~ a mature woman, long married, very placid vanilla monogamous sex life
~her sister in law, also married, but she and her hubby are longterm swingers
~ a barely legal virginal college gal
~ a young married woman, almost still a bride, who has been feeling an urge, but resisting it.
~ a woman in her thirties, divorced, promiscuous, openly slutty.
condider how the rest fit together - neighbours, co workers, relatives, recruited online?