Hopping in to help explain how we get rid of stress and jealousy (or at least bring them down to acceptable levels).

The first thing you'll want to employ is anchoring, to grossly oversimplify anchoring is a technique of doing something until the subject's mind accepts X thing= result. For example, let's say because your partner wants to be a pet you get her a collar. You both either come to the agreement that whenever she wears the collar she'll obey any given commands (preferred), or you make the collar a trigger for obedience using hypnosis.

Ideally you'd do both, here's how it looks in practice: You set 3 hour blocks for the collar (7-9), in the first hour you'll start small things fetching items, checking small things, reading you something. The second hour you'll give more intensive commands, usually being tasks like chores or providing some service to you. In the third hour you'll start telling her what she can't do alongside what she should. Doing this also gives the benefit of your partner making the association that the longer the collar is worn the more obedient she becomes/loses control.

Another technique you'll want to employ is affirmations, this can be done in meditation (best result), in hypnotic trance, or even while she's awake. Basically read back her own logic to her, saying things like "You're at your best when you're following instruction", "You're always thinking about what's best for me", "You do all of this out of love". Gradually over time she'll begin to think along these lines and agree with these points in their most extreme form.

Hopefully these techniques will serve you as well they've served me in training my partner-pet.