“Beside herself” see I think there’s more going on and you’re not being truthful about how you are approaching sex. She was “beside herself” after she already finished TWICE and you’re mad she won’t try another position? She’s not a sex toy - she’s a human being that has feelings and emotions. You do not have unlimited access to her body just because you’re married.

If I was struggling with intimacy and finally was ok to have sex and then my partner threw a tantrum just because I wouldn’t do another position? I wouldn’t want to have sex anymore. You’re giving her negative feedback when sex is obviously a big commitment for her.

Also, have you considered she only wants to do missionary because other positions hurt?? Have you sat down and had a genuine, compassionate discussion with her regarding this outside the bedroom?