Would my ex be jealous after seeing me with someone else even though she broke up with me?

We dated for about 9 months, she told me she loved me after a week and then ended up cheating on me as early as 3 months into the relationship. When we first broke up she ended up hooking up with the guy she cheated on me with and then we got back together after I explicitly told her to go to hell. She showed up at my door step at three in the morning pretty much begging me to take her back. So anyways she ended things with me, again about a month ago. This time I made the decision to leave it at that, especially after I caught her hanging with the dude she cheated on me with. Almost beat the crap outta him. Not one of my finer moments but after basically wasting a year of my life, and a year of college no less, I felt entitled to some sort of release. So naturally I do what any self respecting man does when they've been heartbroken, I jump into bed with whomever the hell I feel like. It actually works to say the least. As I write this I'm partially ranting because Ive refrained from giving her any more space in my life or conversations... The reason for question is because Ive run into her twice since she dumped me, and both times I was with the chick that I'm currently fooling around with. This was completely unintentional and I actually was more disturbed then proud to show of my new better looking partner... Probably because I still love my ex, regardless of the fact that she is a selfish silly wh**e. Both times she looked at the ground and walked in the opposite direction and or positioned herself so that she wouldn't have to look at me or my date. Interestingly enough, she texted after running into me. The first time was "hey i saw you the other day and you looked happy"... the second time was a little more bitter cause she saw my kiss my girl and put my arm around her, we were at dinner with friends and she was at the table directly across from us. She ended texting me right after I left saying that "You better love her or else I will never talk to you again because your playing with her (the new girls) heart" or some bs... Now Ive told her that I still wanted to be friends with her because I have done that, Im actually best friends with one my exs who I dated for 2 years and the breakup was way more painful... I legitimately care about my ex and all I want is for her to be happy but at the same time, no person has disappointed me or hurt me more then she has so naturally I got a bit of selfish and immature satisfaction from her seeing me with this new girl. Now what I would like to know is what exactly was my ex thinking? I have not replied to her texts because I don't need her approval on how I live my life and she doesn't need mine. While we were dating she was extremely controlling and clingy, so my guess is that she is jealous, didn't think I would find someone else so fast (it only took a week), and is realizing that while I still love her I WILL not wait around for her. Also, my ex yelled at me to date other people that last time we talked in person, the same incident where I was about the beat the crap outta the guy she cheated on me with. When I say yelled, I mean she screamed "WE ARE F*CKING OVER, DATE SOMEBODY ELSE, I DONT LOVE YOU ANYMORE"... Now that I am dating someone else she is saying she will never speak to me again if I don't love her... I feel like instead of using logic she just says bullshit based on her volatile emotions and now that I am in fact dating someone else she feels like shes actually lost me. Let me preface this by saying I was a really good to her and the guy she cheated on me always saw her as a piece of meat... We are both 20 but Id like to think I am mature where as she never grew out of her high school state of mind. Any insight into what would be going through her head at this point would be greatly appreciated... I know I shouldn't care but ego and pride are getting the best of me.