As for relationships... has everyone forgotten a http://www.uesp.net/wiki/Morrowind:The_Real_Barenziah_v_II
"What sort of initiation?"
"Ah," Therris said. "Pay up first, sweetness."
[This passage has been censored by order of the Temple.]
Straw was going to kill her, and maybe Therris too. What in Tamriel had possessed her to do such a thing? She cast an apprehensive look around the room, but the other patrons had lost interest and gone back to their own business. She did not recognize any of them; this wasn't the inn where she and Straw were staying. With luck it'd be a while, or never, before Straw found out.
***
Therris was by far the most exciting and attractive man she had yet met. He not only told her about the skills she needed to become a member of the Thieves Guild, but also trained her in them himself or else introduced her to people who could.
Among these was a woman who knew something about magic. Katisha was a plump and matronly Nord. She was married to a smith, had two teenage children, and was perfectly ordinary and respectable--except that she was very fond of cats (and by logical inference, their humanoid counterparts the Khajiit), had a talent for certain kinds of magic, and cultivated rather odd friends. She taught Barenziah an invisibility spell and schooled her in other forms of stealth and disguise. Katisha mingled magical and non-magical talents freely, using one set to enhance the other. She was not a member of the Thieves Guild but was fond of Therris in a motherly sort of way. Barenziah warmed to her as she never had toward any woman, and over the next few weeks she told Katisha all about herself.
She brought Straw there too sometimes. Straw approved of Katisha. But not of Therris. Therris found Straw "interesting" and suggested to Barenziah that they arrange what he called a "threesome."
"Absolutely not," Barenziah said firmly, grateful that Therris had broached the subject in private for once. "He wouldn't like it. I wouldn't like it!"
Therris smiled his charming, triangular feline smile and sprawled lazily on his chair, stretching his limbs and curling his tail. "You might be surprised. Both of you. Pairing is so boring."
Barenziah answered him with a glare.
There's a more... descriptive version in Daggerfall, but I question its legitimacy.