Brad Pitt and
Angelina Jolie's divorce battle has made for a bitter battle, but their shocking split is even causing marriage strain for his ex
Jennifer Aniston and
Justin Theroux! This week a source uncovers the real reason why Jen and Justin have secretly been at each other's throats over Brad & Angie's split — plus, how Justin is trying to get back at his wife's betrayal. Keep clicking through to see what else you'll find in the brand-new issue of
Star this week.