I just tried this out for the first time for a couple hours today, and I gotta say I really like it! A good way to immersively incorporate bestiality into the game.
Fortunately it was also very stable for me and I never ran into any major issues.
Just a few small points, though:
1) After I got the mansion up and running and guests started to arrive, the place got packed. And I mean packed! At one point there was upwards of 20 people in there, putting an unnecessary strain on the system, and also causing problems with NPC's pathfinding since they kept on getting in each others way and then refused to move. (I don't have any other mods that adds NPC's to the game, so it can't be that).
I tried (for roleplayings sake) to rent a room, but because there were NPC's everywhere Thaena got stuck walking back and forth between the stairs and the bar trying to find her way up there. Which leads me to...
2) The layout needs a bit of work. I know it's still in early stages, but still worth bringing up. The whole place could do with a bit of streamlining. The inside space is HUGE, so much so that it almost gave me agoraphobia from just going inside I'm exaggerating of course, but it would benefit from a rehaul. The kitchen for one could be halved without losing anything important and the stair would do better if it was placed inside or closer to the great hall (which was part of the reason Thaena got stuck in that loop). Also, the basement would benefit from making it a bit smaller, at least the corridors. It could give a nice cozier feel to it.
3) And, since the earlier part of the quest involves a lot of running back and forth between the mansion and the town, maybe think about putting in a backdoor so you can shortcut across the cemetary. Yes, it's possible to squeeze between the house and the stable if you're alone, but any followers I had kept getting stuck and besides that, it would make it feel like less of a chore if there was a more convenient way to take.
Just a few small things that bugged me, but other than that it was great