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Despite any potential drama to the situation, Richards opened up to Access Hollywood on Dec. 19 about the trio's unconventional family ties. For example, Richards recently helped take care of Sheen and Mueller's 3-year-old twins Bob and Max while their mother was reportedly in rehab for an addiction to Adderall.
"This is not the first time I've had all five [kids]," Richards told Access Hollywood, referring to the twin boys, as well as her two daughters with Sheen -- Sam, 8, and Lola, 7 -- and her newly adopted daughter, Eloise, 18 months.
"Brooke knows, and Charlie, that anytime they need help with the boys, I'm there," the 41-year-old actress continued.
Richards, who was married to Sheen from 2002 to 2006, admitted that their family dynamics may be slightly unusual, but in a day and age of blended families, it's the best way to make sure their kids value and grow up with their half-siblings.
"They're our family, and they're Sam and Lola's brothers," she explained of the twins. "I can't imagine growing up without my sister, so anytime [Brooke] needs help, I'm there for the boys. [Sam and Lola] are the best big sisters to [the boys], and they love them."
"I know it doesn't seem normal," she continued, "but it is our normal."
So even though Sheen can't seem to stay married to women, his ex-wives are remarkably friendly with him -- and each other!