Should prostate swell up during prostate orgasm??

I hope I could get some answers here to help me understand more about my prostate

According to my wife who did a great job massage my prostate
My prostate never failed to swell up dramatically and become tough just right before traditional ejaculation orgasm
She could easily feel the distinct change and no way I could fake an orgasm if I want to since my prostate will betray me

But the same thing does not happen or observed by her when I am having orgasm solely from prostate massage alone, apart from some initial swelling due to arousal when she starts digging inside, nothing happened much from there onward and things get pretty boring from her perspective

I started to confuse myself whether all these while I am having an anal orgasm since the prostate does not react at all during what I think as my prostate orgasm

so my question is
Am i wrong to think that my prostate should swell up and react the same as my traditional orgasm when I am having prostate orgasm alone?
This question is important to me as I am now currently decided to relearn/rewire my prostate and would serve as a general direction for me to look out for