My uBPD-ex sent this to me 10mins after I dropped off my son tonight

Thank you for spending the day with JJ it sounds like he had a blast. I wish it was not so awkward when you drop him off and pick him up and that we could talk.
Here is something that I just experienced tonight (bare in mind that we are LC [first face to face meeting today] since 8th July) and yes we share S8. All contact has been via email only since going LC and I have managed to avoid/see her completely during pick-ups using her brother to meet me. She made sure today she was there at her house as she has been extremely nice since I left her (of course her cheating had nothing to do with it, my fault ).
This the reason I share this, when she becomes extremely nice it is either she wants something (lose of control) or me, Control vs Recycling. Since leaving over six weeks ago I control everything in regards to me and me visiting/call/talking to my son, it is always on my terms. Yes, there is little altercations, but my ex still hasn't figured out how to set up her own email account and get this it is all on work email . So, she seems to always stop herself when she realizes that she is about to get angry and it is real hard to hold a good fight via email I learned as you don't have to play !
Picked my son up, went to her door and she opened it to greet me, "Hello, come on in"... . "No, I am here to pick up our Son and I will wait for him the car". I walked away and went to car. After I had him, I sent an email informing her when he would be back that evening.  :)rop-off went like this, again walked to door with son, she answered... . "Hello guys, did you have a great time?" My response was "yep", leaned over to son as we have already said our good-bye's and gave him another kiss and I Love You!
What I am getting at is, YOU control everything about YOU and your WORLD. There are no control issues or recycling if you don' play, however I know everyone's BPD issues are different and it was a war to get mine where it is now. Fix you and the rest comes I promise!
Ultimately I wanted to share this with you all, because the calm before the storm starts with her recycling is all to kill me with kindness and then "Can we Talk"! So, she loses control over me, then I let her back in by talk, thus I lose control and it goes around and around... . that is the past as I want it to be, now there is no communication if it doesn't involve my son. I control the recycling!
If this can help just one person here I will be so happy, as so many here are helping through this nightmare