Alex Rodriguez’s ex Cynthia Rodriguez is not about to let Jennifer Lopez intervene with their child support drama. 

J.Lo attended a mediation in Miami between the former Yankees player and Cynthia last September. Now, she’s inserted herself into their child support negotiations, sources told The Post. And Cynthia is not happy. 

The legal proceeding quickly devolved when J.Lo insisted that A.Rod should only have to pay $10,000 a month in child support — dimes, compared to the reported $100,000-plus he’d been playing to support his young daughters Natasha and Ella, sources said.

“She’s driving the bus,” one source said J.Lo. 

“All I can tell you, there’s been a shift, and I’m not sure what to attribute it to,” Cynthia said to The Post. “Alex has dated some wonderful women since our divorce, many of whom have had positive relationships with our children. Alex and I have worked well trying to create a stable environment for our daughters and there has never been an issue. Until now.”

WHAT!