Yeah, in fact I'm not sure if there is any mutually exlusive content. In fact, a couple characters' routes are only opened up by progressing far enough with some other character's plotline.
thanks for the reply. lol honestly I just feel bad when I go back and forth between Fawn, Rinny, and Cassie, considering that I've impregnated Cassie already, it makes me feel like I'm cheating whenever I get touchy with someone else without Cassie's acknowledgment.
Understandable, but for a better look at exactly how cool she is with it, try capturing a bandit girl. Or building the dungeon in Cassie's basement; Cassie doesn't seem to mind you bringing Fawn or Rinny down there from time to time.
As mentioned, most of the relationships in the game aren't exclusive! There will eventually be a point where you can settle down with someone in particular though!