"It's affecting her milk production and, quite simply, breaking her heart," a friend of the new mom, who welcomed daughter Alijah Mary with Baskett in May, tells PEOPLE.
While friends have been rallying around the mother of two – Alijah's older brother, Hank IV, is 4½ – one person who has lent his unwavering support is Wilkinson's former boyfriend Hugh Hefner.
"She said that Hef has offered to help in any way he can but has been urging her to try and work it out, as he knows how hard divorce can be on the kids," says the source. "But that if she is going to leave, to do it now while the kids are young enough not to remember life any other way."
Baskett, 31, allegedly cheated on his wife with a transsexual model. Wilkinson has since been spotted without her wedding ring and "cries every day," says the friend, but she is holding off on making any drastic decisions about her marriage for the sake of their children.
A source also tells PEOPLE that the couple's marital troubles will be documented on Wilkinson's reality show, Kendra on Top.
"Hank and Kendra are fully engaged in the show," the source said. "People who want to see the two of them will definitely see the two of them. The cameras have been rolling. Viewers will get to see everything."
For more on Kendra's struggle to keep her family together, pick up this week's issue of PEOPLE, on newsstands Friday