The restauranteur's loss comes a little over a year after her brother Mark's suicide in April 2018.
"It was obviously a very emotional journey for Lisa, but she is so glad that she went. She needed the closure and really needed to be there for her family, especially after just losing her brother Mark a year ago," a source told the outlet.
The source added that Lisa is "back home and she is ready to get back to work and back to her life."
"I started on antidepressants after my brother passed, and grief counseling. After such a depressing year, I worry about the toll it might take. That’s one of the reasons I wanted to step away from Housewives," she previously explained of her decision to quit.