Hi my friend @lorilikes.
It is likely you are in espionaging mission to indicate a mean woman who made you highly reactive. I have read full article of your posting. I also have read all those comments below your long and many lines story passage. Most of them give you support to be strong, and they believe that you are strong enough to solve your problems. In this case, I agree with their assumes and hopes.
Here a little opinion from me as you texted on the head of this article above. I would like to give answer to the question
"Does jealousy stem from sexual arousal?".
The answer is yes in one point of view, as you said this thought is in your perspective, but in general case, so many other aspects include to contribute to set jealousy up, some of them are distrust, miscommunication, disappreciate, diny, disobey, disharmonies, ignorant,etc.
Have a nice day friend. Wishing you all best now and on.