For the horse.
After you talk to Polina (the gem merchant) make her delivery to the shop in the village and go back to the mansion, talk to Chiriste (or whatever her name is, the breeder woman) then go to the cook on the first floor of the mansion. He needs some meat, after you deliver it to him, Polina comes to visit.
After making a deal. She basically gets told that it's customary for guests to enjoy the special services the farm provides with it's specially modified animals. Since she is a high society wannabe and tries to act like the wealthiest people, she actually goes with it, and gets dominated real hard. When she asks why the horse wasn't cleaned before, Chiriste tells her they wanted to give her the most optimal service. Polina even contemplates that these posh old hags enjoy this kind of depravity in the dirtiest way possible, but still allows herself to get fucked by a horse.
She is pretty dumb, and that's the way I like it.
Edit: Here's your save with the horse as well. I have no clue about the woman in the second village, never found her in 0.25, but she could have been bugged in that one.