>>76556958 (OP)
ruin her life and her new man's life.
find where her new mans lives and works.
file a formal anonymous complaint of the most heinous shit for both of them.
if you haven't broken it off yet, pretend everything is good and go through her phone while she's sleeping and try to get access to the passwords app if iphone to get into her IG.
login through your phone and remove all the unrecognized login notifs.
if she has a laptop, add real VNC, go through the command prompt/terminal to force the laptop to never sleep and access her shit at all times.
go on from there after.
the best revenge is to see these fuckers see you doing well. but it's also wonderful to put the powers that be actions into your hands. sometimes karma takes too damn long and if you have the ability to do shit. do it. that's why there's a green light there in the first place.