I have to say freetime, you're a braver man than I. I wouldn't be able to watch TP on a date. Mind you at this point I have been on dates with Mr A there...that not withstanding you're very fresh and this going out might have been pushing you past your comfort limit...
It's self destructive to torture yourself by seeing her out...that being said I've felt the same jealousy of TP going out and not anything about who she's with. Redpepper was right, when she goes out plan to fill your time; I went to the gym, read, played xbox...chores, anything to keep busy...
We're here for you and you are doing well, keep it up and be patient, the frustration will pass.
Polyamory is wrong! It's Multiamory or Polyphilia. Mixing Greek and Latin roots? That's wrong.