Kimora Lee Simmons is speaking candidly about her relationship–or lack thereof–with the fathers of her children.

The entrepreneur and reality star talked about the lack of communication between her and her exes during a new interview with PEOPLE, admitting that she doesn’t “have a relationship really” with any of her kids’ fathers.

“Usually I would say that I co-parent okay, but the kids are with me full-time,” Simmons said. “I’m pretty much the primary parent. It’s difficult, but I don’t know sometimes what other people are thinking. Guys are weird.”

Simmons, 50, has daughters Ming Lee, 25, and Aoki Lee, 23, with her ex-husband, record executive Russell Simmons; son Kenzo Lee, 16, with actor Djimon Hounsou; and son Wolfe Lee, 10, with former investment banker Tim Leissner, who was sent

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