There’s no love lost between alleged NXIVM sex cult leader Keith Raniere and his ex-girlfriend — who showed up in court Friday just to see him squirm.

Toni Natalie says Raniere is a “sociopath” who has harassed and terrorized her ever since she broke up with him nearly two decades ago.

Since 1999, Raniere and his minions have hassled her with lawsuits, Natalie said.

“It’s terrorism by litigation,” Natalie, 59, said outside Brooklyn federal court, where Raniere appeared at a pretrial hearing. “For me to see him held accountable, it’s pretty important.”