Jennifer Lopez and Marc Anthony split after failing to "see eye-to-eye" on Scientology.
The On The Floor hitmaker - who called time on her seven-year marriage to the singer last month - was reportedly hoping to send the couple's three-year-old twins Max and Emme to a specialist Scientology school, however Marc wasn't so keen on the idea.
A source told the Mail on Sunday newspaper: "Jennifer and Marc couldn't see eye-to-eye on the subject. She's always been more into the church than him. He wasn't a huge fan and it caused problems."
The 42-year-old star recently admitted she wished people reserved their preconceived notions on Scientology - also followed by Jennifer's close friends Tom Cruise and Katie Holmes - before learning more about it.
She said: "I just wish that people wouldn't judge it without knowing what it is."