Keeping spoiler-y info to a minimum...after you learn the Summon spell there are scenes with Beth & Mia which you may have issues with. You might also have issues with Vixenatrix and Venomina. Possibly Annabelle as well depending on your sensibilities. And there are female vampires which must be interacted with to advance the Temple storyline...So, you are saying things like "The Peddler's Fate" doesn't happen too much and if I bear one or two of them I should be ok? I still would prefer if there was an option for completing this quest without having sex with her (especially because you have to complete this quest in order to progress through the game, if it was something optional I just wouldn't do that quest and be done with it). Like killing her or deceiving her.
Beth can be a one-time thing but Venomina requires at least a few times. Mia's content doesn't have to be done at all, but it does lead (via Liandra at the Well) to a HIGHLY helpful item for when you face Master later in the game. Vixenatrix's scene(s) can be avoided, it's dangerous but I've done it.
That's all I can think of in addition to stuff already mentioned.