I wonder what exactly they mean by the bull controls the couple. If maybe it's a Dojima situation, where he understands the fetish, so he's able to suggest ideas for what she can do to excite the husband, or if it's something else.The older bull controls the couple.
Also, I wonder if the MC is not gonna be given a sprite. Might make for weird wife POV scenes if he's just this vague male silhouette.